21430032099 has 16 divisors (see below), whose sum is σ = 32660194560. Its totient is φ = 12243892320.

The previous prime is 21430032089. The next prime is 21430032139. The reversal of 21430032099 is 99023003412.

It is a Cunningham number, because it is equal to 146390²-1.

It is not a de Polignac number, because 21430032099 - 2²³ = 21421643491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21430032089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73197 + ... + 219585.

It is an arithmetic number, because the mean of its divisors is an integer number (2041262160).

Almost surely, 2^21430032099 is an apocalyptic number.

21430032099 is a deficient number, since it is larger than the sum of its proper divisors (11230162461).

21430032099 is a wasteful number, since it uses less digits than its factorization.

21430032099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153370.

The product of its (nonzero) digits is 11664, while the sum is 33.

The spelling of 21430032099 in words is "twenty-one billion, four hundred thirty million, thirty-two thousand, ninety-nine".