21653051446431 has 6 divisors (see below), whose sum is σ = 31276629867080. Its totient is φ = 14435367630948.

The previous prime is 21653051446417. The next prime is 21653051446517. The reversal of 21653051446431 is 13464415035612.

21653051446431 is a `hidden beast` number, since 2 + 1 + 6 + 53 + 0 + 514 + 46 + 43 + 1 = 666.

It is not a de Polignac number, because 21653051446431 - 2¹⁴ = 21653051430047 is a prime.

It is a super-2 number, since 2×21653051446431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653051446031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1202947302571 + ... + 1202947302588.

Almost surely, 2^{21653051446431} is an apocalyptic number.

21653051446431 is a deficient number, since it is larger than the sum of its proper divisors (9623578420649).

21653051446431 is a wasteful number, since it uses less digits than its factorization.

21653051446431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405894605165 (or 2405894605162 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 21653051446431 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-one million, four hundred forty-six thousand, four hundred thirty-one".