20876388 has 48 divisors (see below), whose sum is σ = 52844736. Its totient is φ = 6376320.

The previous prime is 20876351. The next prime is 20876389. The reversal of 20876388 is 88367802.

It is not an unprimeable number, because it can be changed into a prime (20876389) 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, 25018 + ... + 25838.

It is an arithmetic number, because the mean of its divisors is an integer number (1100932).

Almost surely, 2^20876388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20876388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26422368).

20876388 is an abundant number, since it is smaller than the sum of its proper divisors (31968348).

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

20876388 is a wasteful number, since it uses less digits than its factorization.

20876388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 20876388 is about 4569.0686140613. The cubic root of 20876388 is about 275.3500248167.

The spelling of 20876388 in words is "twenty million, eight hundred seventy-six thousand, three hundred eighty-eight".