21371570622 has 24 divisors (see below), whose sum is σ = 46996192776. Its totient is φ = 7017530256.

The previous prime is 21371570599. The next prime is 21371570657. The reversal of 21371570622 is 22607517312.

21371570622 is a `hidden beast` number, since 2 + 13 + 7 + 15 + 7 + 0 + 622 = 666.

It is a super-2 number, since 2×21371570622² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8859313 + ... + 8861724.

It is an arithmetic number, because the mean of its divisors is an integer number (1958174699).

Almost surely, 2^21371570622 is an apocalyptic number.

21371570622 is an abundant number, since it is smaller than the sum of its proper divisors (25624622154).

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

21371570622 is a wasteful number, since it uses less digits than its factorization.

21371570622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721112 (or 17721109 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 21371570622 in words is "twenty-one billion, three hundred seventy-one million, five hundred seventy thousand, six hundred twenty-two".