21470666461525 has 24 divisors (see below), whose sum is σ = 26650918526688. Its totient is φ = 17158927800000.

The previous prime is 21470666461459. The next prime is 21470666461591. The reversal of 21470666461525 is 52516466607412.

It is an interprime number because it is at equal distance from previous prime (21470666461459) and next prime (21470666461591).

It is not a de Polignac number, because 21470666461525 - 2³⁵ = 21436306723157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 545738355 + ... + 545777695.

It is an arithmetic number, because the mean of its divisors is an integer number (1110454938612).

Almost surely, 2^{21470666461525} is an apocalyptic number.

21470666461525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21470666461525 is a deficient number, since it is larger than the sum of its proper divisors (5180252065163).

21470666461525 is a wasteful number, since it uses less digits than its factorization.

21470666461525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61173 (or 61168 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 21470666461525 in words is "twenty-one trillion, four hundred seventy billion, six hundred sixty-six million, four hundred sixty-one thousand, five hundred twenty-five".