20607972 has 48 divisors (see below), whose sum is σ = 59953152. Its totient is φ = 5352480.

The previous prime is 20607971. The next prime is 20607991. The reversal of 20607972 is 27970602.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20607971) 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, 10228 + ... + 12075.

It is an arithmetic number, because the mean of its divisors is an integer number (1249024).

Almost surely, 2^20607972 is an apocalyptic number.

20607972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20607972 is an abundant number, since it is smaller than the sum of its proper divisors (39345180).

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

20607972 is a wasteful number, since it uses less digits than its factorization.

20607972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22328 (or 22326 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 20607972 is about 4539.6004229447. The cubic root of 20607972 is about 274.1648359043.

The spelling of 20607972 in words is "twenty million, six hundred seven thousand, nine hundred seventy-two".