20675040 has 96 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 5220864.

The previous prime is 20675033. The next prime is 20675041. The reversal of 20675040 is 4057602.

20675040 = T₉₃₆ + T₉₃₇ + ... + T₉₈₀.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20675040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7987 + ... + 10253.

It is an arithmetic number, because the mean of its divisors is an integer number (714420).

Almost surely, 2^20675040 is an apocalyptic number.

20675040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20675040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292160).

20675040 is an abundant number, since it is smaller than the sum of its proper divisors (47909280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20675040 is a wasteful number, since it uses less digits than its factorization.

20675040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2296 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20675040 is about 4546.9814162805. The cubic root of 20675040 is about 274.4619341311.

The spelling of 20675040 in words is "twenty million, six hundred seventy-five thousand, forty".