20372818 has 16 divisors (see below), whose sum is σ = 31842720. Its totient is φ = 9767200.

The previous prime is 20372801. The next prime is 20372837. The reversal of 20372818 is 81827302.

It is a super-2 number, since 2×20372818² = 830103426522248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20372818.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2733 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (1990170).

Almost surely, 2^20372818 is an apocalyptic number.

20372818 is a deficient number, since it is larger than the sum of its proper divisors (11469902).

20372818 is a wasteful number, since it uses less digits than its factorization.

20372818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 20372818 is about 4513.6258152399. The cubic root of 20372818 is about 273.1180282804.

The spelling of 20372818 in words is "twenty million, three hundred seventy-two thousand, eight hundred eighteen".