21062957299 has 4 divisors (see below), whose sum is σ = 21377329864. Its totient is φ = 20748584736.

The previous prime is 21062957263. The next prime is 21062957303. The reversal of 21062957299 is 99275926012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21062957299 - 2²¹ = 21060860147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21062952299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157186182 + ... + 157186315.

It is an arithmetic number, because the mean of its divisors is an integer number (5344332466).

Almost surely, 2^21062957299 is an apocalyptic number.

21062957299 is a deficient number, since it is larger than the sum of its proper divisors (314372565).

21062957299 is an equidigital number, since it uses as much as digits as its factorization.

21062957299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314372564.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 21062957299 in words is "twenty-one billion, sixty-two million, nine hundred fifty-seven thousand, two hundred ninety-nine".