21158959482 has 20 divisors (see below), whose sum is σ = 47411742906. Its totient is φ = 7052986440.

The previous prime is 21158959363. The next prime is 21158959489. The reversal of 21158959482 is 28495985112.

21158959482 is a `hidden beast` number, since 2 + 1 + 1 + 589 + 59 + 4 + 8 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18815334561 + 2343624921 = 137169^2 + 48411^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21158959489) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 65305269 + ... + 65305592.

Almost surely, 2^21158959482 is an apocalyptic number.

21158959482 is an abundant number, since it is smaller than the sum of its proper divisors (26252783424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21158959482 is a wasteful number, since it uses less digits than its factorization.

21158959482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130610875 (or 130610866 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

The spelling of 21158959482 in words is "twenty-one billion, one hundred fifty-eight million, nine hundred fifty-nine thousand, four hundred eighty-two".