21470061375637 has 4 divisors (see below), whose sum is σ = 24537213000736. Its totient is φ = 18402909750540.

The previous prime is 21470061375629. The next prime is 21470061375647. The reversal of 21470061375637 is 73657316007412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21470061375637 - 2³ = 21470061375629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470061375647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1533575812539 + ... + 1533575812552.

It is an arithmetic number, because the mean of its divisors is an integer number (6134303250184).

Almost surely, 2^{21470061375637} is an apocalyptic number.

It is an amenable number.

21470061375637 is a deficient number, since it is larger than the sum of its proper divisors (3067151625099).

21470061375637 is an equidigital number, since it uses as much as digits as its factorization.

21470061375637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067151625098.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 21470061375637 in words is "twenty-one trillion, four hundred seventy billion, sixty-one million, three hundred seventy-five thousand, six hundred thirty-seven".