21475873484 has 24 divisors (see below), whose sum is σ = 40482421728. Its totient is φ = 9909820800.

The previous prime is 21475873477. The next prime is 21475873541. The reversal of 21475873484 is 48437857412.

It is a happy number.

It is a super-2 number, since 2×21475873484² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215744 + ... + 299160.

It is an arithmetic number, because the mean of its divisors is an integer number (1686767572).

Almost surely, 2^21475873484 is an apocalyptic number.

It is an amenable number.

21475873484 is a deficient number, since it is larger than the sum of its proper divisors (19006548244).

21475873484 is a wasteful number, since it uses less digits than its factorization.

21475873484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88385 (or 88383 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 53.

The spelling of 21475873484 in words is "twenty-one billion, four hundred seventy-five million, eight hundred seventy-three thousand, four hundred eighty-four".