21275471692 has 24 divisors (see below), whose sum is σ = 39209491440. Its totient is φ = 10073269440.

The previous prime is 21275471683. The next prime is 21275471699. The reversal of 21275471692 is 29617457212.

It is not an unprimeable number, because it can be changed into a prime (21275471699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107442 + ... + 232582.

It is an arithmetic number, because the mean of its divisors is an integer number (1633728810).

Almost surely, 2^21275471692 is an apocalyptic number.

It is an amenable number.

21275471692 is a deficient number, since it is larger than the sum of its proper divisors (17934019748).

21275471692 is a wasteful number, since it uses less digits than its factorization.

21275471692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127401 (or 127399 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The spelling of 21275471692 in words is "twenty-one billion, two hundred seventy-five million, four hundred seventy-one thousand, six hundred ninety-two".