20952099 has 12 divisors (see below), whose sum is σ = 34587696. Its totient is φ = 11972592.

The previous prime is 20952091. The next prime is 20952161. The reversal of 20952099 is 99025902.

It is not a de Polignac number, because 20952099 - 2³ = 20952091 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 a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (20952091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166224 + ... + 166349.

It is an arithmetic number, because the mean of its divisors is an integer number (2882308).

Almost surely, 2^20952099 is an apocalyptic number.

20952099 is a deficient number, since it is larger than the sum of its proper divisors (13635597).

20952099 is a wasteful number, since it uses less digits than its factorization.

20952099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332586 (or 332583 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 20952099 is about 4577.3462836014. The cubic root of 20952099 is about 275.6824877389.

The spelling of 20952099 in words is "twenty million, nine hundred fifty-two thousand, ninety-nine".