21167621630 has 8 divisors (see below), whose sum is σ = 38101718952. Its totient is φ = 8467048648.

The previous prime is 21167621603. The next prime is 21167621677. The reversal of 21167621630 is 3612676112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058381072 + ... + 1058381091.

It is an arithmetic number, because the mean of its divisors is an integer number (4762714869).

Almost surely, 2^21167621630 is an apocalyptic number.

21167621630 is a deficient number, since it is larger than the sum of its proper divisors (16934097322).

21167621630 is a wasteful number, since it uses less digits than its factorization.

21167621630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116762170.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 21167621630 in words is "twenty-one billion, one hundred sixty-seven million, six hundred twenty-one thousand, six hundred thirty".