20988902 has 24 divisors (see below), whose sum is σ = 35428008. Its totient is φ = 9313920.

The previous prime is 20988893. The next prime is 20988907.

20988902 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9398 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (1476167).

Almost surely, 2^20988902 is an apocalyptic number.

20988902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20988902 is a deficient number, since it is larger than the sum of its proper divisors (14439106).

20988902 is a wasteful number, since it uses less digits than its factorization.

20988902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084 (or 2073 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 20988902 is about 4581.3646438589. The cubic root of 20988902 is about 275.8438082162.

The spelling of 20988902 in words is "twenty million, nine hundred eighty-eight thousand, nine hundred two".