20900799 has 12 divisors (see below), whose sum is σ = 30322656. Its totient is φ = 13872672.

The previous prime is 20900797. The next prime is 20900821. The reversal of 20900799 is 99700902.

It is not a de Polignac number, because 20900799 - 2¹ = 20900797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2887 + ... + 7080.

It is an arithmetic number, because the mean of its divisors is an integer number (2526888).

Almost surely, 2^20900799 is an apocalyptic number.

20900799 is a deficient number, since it is larger than the sum of its proper divisors (9421857).

20900799 is a wasteful number, since it uses less digits than its factorization.

20900799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206 (or 10203 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 20900799 is about 4571.7391657880. The cubic root of 20900799 is about 275.4573063267.

The spelling of 20900799 in words is "twenty million, nine hundred thousand, seven hundred ninety-nine".