20677040 has 40 divisors (see below), whose sum is σ = 48465648. Its totient is φ = 8203520.

The previous prime is 20677037. The next prime is 20677051. The reversal of 20677040 is 4077602.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9494 + ... + 11466.

Almost surely, 2^20677040 is an apocalyptic number.

20677040 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 20677040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24232824).

20677040 is an abundant number, since it is smaller than the sum of its proper divisors (27788608).

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

20677040 is a wasteful number, since it uses less digits than its factorization.

20677040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20677040 is about 4547.2013370864. The cubic root of 20677040 is about 274.4707838709.

The spelling of 20677040 in words is "twenty million, six hundred seventy-seven thousand, forty".