21365025226460 has 24 divisors (see below), whose sum is σ = 45498476259936. Its totient is φ = 8425643750720.

The previous prime is 21365025226393. The next prime is 21365025226487. The reversal of 21365025226460 is 6462252056312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7522894787 + ... + 7522897626.

It is an arithmetic number, because the mean of its divisors is an integer number (1895769844164).

Almost surely, 2^{21365025226460} is an apocalyptic number.

21365025226460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21365025226460 is an abundant number, since it is smaller than the sum of its proper divisors (24133451033476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21365025226460 is a wasteful number, since it uses less digits than its factorization.

21365025226460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15045792493 (or 15045792491 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 21365025226460 in words is "twenty-one trillion, three hundred sixty-five billion, twenty-five million, two hundred twenty-six thousand, four hundred sixty".