20900436 has 24 divisors (see below), whose sum is σ = 48875904. Its totient is φ = 6951360.

The previous prime is 20900413. The next prime is 20900441. The reversal of 20900436 is 63400902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (2036496).

Almost surely, 2^20900436 is an apocalyptic number.

It is an amenable number.

20900436 is an abundant number, since it is smaller than the sum of its proper divisors (27975468).

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

20900436 is a wasteful number, since it uses less digits than its factorization.

20900436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871 (or 3869 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20900436 is about 4571.6994651880. The cubic root of 20900436 is about 275.4557116256.

The spelling of 20900436 in words is "twenty million, nine hundred thousand, four hundred thirty-six".