21574028162 has 4 divisors (see below), whose sum is σ = 32361042246. Its totient is φ = 10787014080.

The previous prime is 21574028141. The next prime is 21574028167. The reversal of 21574028162 is 26182047512.

It is a Cunningham number, because it is equal to 146881²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21574028161 + 1 = 146881^2 + 1^2 .

It is a super-2 number, since 2×21574028162² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21574028167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5393507039 + ... + 5393507042.

Almost surely, 2^21574028162 is an apocalyptic number.

21574028162 is a deficient number, since it is larger than the sum of its proper divisors (10787014084).

21574028162 is a wasteful number, since it uses less digits than its factorization.

21574028162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10787014083.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 21574028162 in words is "twenty-one billion, five hundred seventy-four million, twenty-eight thousand, one hundred sixty-two".