20072668 has 24 divisors (see below), whose sum is σ = 43795584. Its totient is φ = 7820400.

The previous prime is 20072651. The next prime is 20072681. The reversal of 20072668 is 86627002.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 32278 + ... + 32893.

It is an arithmetic number, because the mean of its divisors is an integer number (1824816).

Almost surely, 2^20072668 is an apocalyptic number.

20072668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20072668 is an abundant number, since it is smaller than the sum of its proper divisors (23722916).

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

20072668 is a wasteful number, since it uses less digits than its factorization.

20072668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65193 (or 65191 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20072668 is about 4480.2531178495. The cubic root of 20072668 is about 271.7701164642.

The spelling of 20072668 in words is "twenty million, seventy-two thousand, six hundred sixty-eight".