20900902 has 8 divisors (see below), whose sum is σ = 34201512. Its totient is φ = 9500400.

The previous prime is 20900899. The next prime is 20900903.

20900902 is nontrivially palindromic in base 10.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 950041 = 20900902 / (2 + 0 + 9 + 0 + 0 + 9 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474999 + ... + 475042.

It is an arithmetic number, because the mean of its divisors is an integer number (4275189).

Almost surely, 2^20900902 is an apocalyptic number.

20900902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20900902 is a deficient number, since it is larger than the sum of its proper divisors (13300610).

20900902 is a wasteful number, since it uses less digits than its factorization.

20900902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950054.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20900902 is about 4571.7504306338. The cubic root of 20900902 is about 275.4577588143.

The spelling of 20900902 in words is "twenty million, nine hundred thousand, nine hundred two".