20388902 has 8 divisors (see below), whose sum is σ = 31913136. Its totient is φ = 9751192.

The previous prime is 20388883. The next prime is 20388947. The reversal of 20388902 is 20988302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221573 + ... + 221664.

It is an arithmetic number, because the mean of its divisors is an integer number (3989142).

Almost surely, 2^20388902 is an apocalyptic number.

20388902 is a deficient number, since it is larger than the sum of its proper divisors (11524234).

20388902 is a wasteful number, since it uses less digits than its factorization.

20388902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443262.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20388902 is about 4515.4071798676. The cubic root of 20388902 is about 273.1898834169.

The spelling of 20388902 in words is "twenty million, three hundred eighty-eight thousand, nine hundred two".