20655672 has 32 divisors (see below), whose sum is σ = 53306880. Its totient is φ = 6662880.

The previous prime is 20655671. The next prime is 20655673. The reversal of 20655672 is 27655602.

It is an interprime number because it is at equal distance from previous prime (20655671) and next prime (20655673).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13138 + ... + 14625.

It is an arithmetic number, because the mean of its divisors is an integer number (1665840).

Almost surely, 2^20655672 is an apocalyptic number.

It is an amenable number.

20655672 is an abundant number, since it is smaller than the sum of its proper divisors (32651208).

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

20655672 is a wasteful number, since it uses less digits than its factorization.

20655672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27803 (or 27799 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20655672 is about 4544.8511526782. The cubic root of 20655672 is about 274.3762037124.

The spelling of 20655672 in words is "twenty million, six hundred fifty-five thousand, six hundred seventy-two".