21734952531 has 16 divisors (see below), whose sum is σ = 29928526848. Its totient is φ = 14016103200.

The previous prime is 21734952529. The next prime is 21734952539. The reversal of 21734952531 is 13525943712.

It is not a de Polignac number, because 21734952531 - 2¹ = 21734952529 is a prime.

It is a super-2 number, since 2×21734952531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21734952539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153940 + ... + 259166.

It is an arithmetic number, because the mean of its divisors is an integer number (1870532928).

Almost surely, 2^21734952531 is an apocalyptic number.

21734952531 is a deficient number, since it is larger than the sum of its proper divisors (8193574317).

21734952531 is a wasteful number, since it uses less digits than its factorization.

21734952531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107482.

The product of its digits is 226800, while the sum is 42.

The spelling of 21734952531 in words is "twenty-one billion, seven hundred thirty-four million, nine hundred fifty-two thousand, five hundred thirty-one".