21430751837 has 32 divisors (see below), whose sum is σ = 25859554560. Its totient is φ = 17519518720.

The previous prime is 21430751827. The next prime is 21430751843. The reversal of 21430751837 is 73815703412.

It is not a de Polignac number, because 21430751837 - 2¹⁰ = 21430750813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21430751794 and 21430751803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430751827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4767563 + ... + 4772055.

It is an arithmetic number, because the mean of its divisors is an integer number (808111080).

Almost surely, 2^21430751837 is an apocalyptic number.

It is an amenable number.

21430751837 is a deficient number, since it is larger than the sum of its proper divisors (4428802723).

21430751837 is a wasteful number, since it uses less digits than its factorization.

21430751837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5653.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 21430751837 in words is "twenty-one billion, four hundred thirty million, seven hundred fifty-one thousand, eight hundred thirty-seven".