21420053199 has 12 divisors (see below), whose sum is σ = 32568502200. Its totient is φ = 13528454544.

The previous prime is 21420053197. The next prime is 21420053201. The reversal of 21420053199 is 99135002412.

21420053199 is a `hidden beast` number, since 2 + 14 + 20 + 0 + 531 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (21420053197) and next prime (21420053201).

It is not a de Polignac number, because 21420053199 - 2¹ = 21420053197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21420053197) 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, 62631564 + ... + 62631905.

It is an arithmetic number, because the mean of its divisors is an integer number (2714041850).

Almost surely, 2^21420053199 is an apocalyptic number.

21420053199 is a deficient number, since it is larger than the sum of its proper divisors (11148449001).

21420053199 is a wasteful number, since it uses less digits than its factorization.

21420053199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125263494 (or 125263491 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 21420053199 in words is "twenty-one billion, four hundred twenty million, fifty-three thousand, one hundred ninety-nine".