20772099 has 16 divisors (see below), whose sum is σ = 30873600. Its totient is φ = 13803048.

The previous prime is 20772067. The next prime is 20772107. The reversal of 20772099 is 99027702.

It is not a de Polignac number, because 20772099 - 2⁵ = 20772067 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20772019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8622 + ... + 10764.

It is an arithmetic number, because the mean of its divisors is an integer number (1929600).

Almost surely, 2^20772099 is an apocalyptic number.

20772099 is a deficient number, since it is larger than the sum of its proper divisors (10101501).

20772099 is a wasteful number, since it uses less digits than its factorization.

20772099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 2505 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 20772099 is about 4557.6418244526. The cubic root of 20772099 is about 274.8907510949.

The spelling of 20772099 in words is "twenty million, seven hundred seventy-two thousand, ninety-nine".