20376864 has 36 divisors (see below), whose sum is σ = 57947526. Its totient is φ = 6792192.

The previous prime is 20376847. The next prime is 20376869. The reversal of 20376864 is 46867302.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1192464 = 4380^2 + 1092^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×20376864³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20376869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35089 + ... + 35664.

Almost surely, 2^20376864 is an apocalyptic number.

20376864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20376864 is an abundant number, since it is smaller than the sum of its proper divisors (37570662).

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

20376864 is a wasteful number, since it uses less digits than its factorization.

20376864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70769 (or 70758 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 20376864 is about 4514.0739914184. The cubic root of 20376864 is about 273.1361073110.

The spelling of 20376864 in words is "twenty million, three hundred seventy-six thousand, eight hundred sixty-four".