20675420 has 24 divisors (see below), whose sum is σ = 45704400. Its totient is φ = 7834752.

The previous prime is 20675399. The next prime is 20675423. The reversal of 20675420 is 2457602.

It is a self number, because there is not a number n which added to its sum of digits gives 20675420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26825 + ... + 27584.

It is an arithmetic number, because the mean of its divisors is an integer number (1904350).

Almost surely, 2^20675420 is an apocalyptic number.

20675420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20675420 is an abundant number, since it is smaller than the sum of its proper divisors (25028980).

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

20675420 is a wasteful number, since it uses less digits than its factorization.

20675420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54437 (or 54435 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20675420 is about 4547.0232020521. The cubic root of 20675420 is about 274.4636156256.

The spelling of 20675420 in words is "twenty million, six hundred seventy-five thousand, four hundred twenty".