21340626025 has 12 divisors (see below), whose sum is σ = 26485010704. Its totient is φ = 17057898000.

The previous prime is 21340626023. The next prime is 21340626037. The reversal of 21340626025 is 52062604312.

It is not a de Polignac number, because 21340626025 - 2¹ = 21340626023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21340626023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335211 + ... + 393760.

Almost surely, 2^21340626025 is an apocalyptic number.

21340626025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21340626025 is a deficient number, since it is larger than the sum of its proper divisors (5144384679).

21340626025 is a wasteful number, since it uses less digits than its factorization.

21340626025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730152 (or 730147 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 21340626025 in words is "twenty-one billion, three hundred forty million, six hundred twenty-six thousand, twenty-five".