21425353724275 has 6 divisors (see below), whose sum is σ = 26567438618132. Its totient is φ = 17140282979400.

The previous prime is 21425353724263. The next prime is 21425353724311. The reversal of 21425353724275 is 57242735352412.

It is not a de Polignac number, because 21425353724275 - 2¹³ = 21425353716083 is a prime.

It is a super-2 number, since 2×21425353724275² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 428507074461 + ... + 428507074510.

Almost surely, 2^{21425353724275} is an apocalyptic number.

21425353724275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21425353724275 is a deficient number, since it is larger than the sum of its proper divisors (5142084893857).

21425353724275 is an equidigital number, since it uses as much as digits as its factorization.

21425353724275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857014148981 (or 857014148976 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 52.

The spelling of 21425353724275 in words is "twenty-one trillion, four hundred twenty-five billion, three hundred fifty-three million, seven hundred twenty-four thousand, two hundred seventy-five".