21310634457 has 24 divisors (see below), whose sum is σ = 35704533696. Its totient is φ = 11995749216.

The previous prime is 21310634437. The next prime is 21310634467. The reversal of 21310634457 is 75443601312.

21310634457 is a `hidden beast` number, since 2 + 1 + 3 + 10 + 634 + 4 + 5 + 7 = 666.

It is not a de Polignac number, because 21310634457 - 2¹² = 21310630361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21310634437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2520138 + ... + 2528579.

It is an arithmetic number, because the mean of its divisors is an integer number (1487688904).

Almost surely, 2^21310634457 is an apocalyptic number.

It is an amenable number.

21310634457 is a deficient number, since it is larger than the sum of its proper divisors (14393899239).

21310634457 is a wasteful number, since it uses less digits than its factorization.

21310634457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048797 (or 5048794 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 21310634457 in words is "twenty-one billion, three hundred ten million, six hundred thirty-four thousand, four hundred fifty-seven".