21401634358 has 16 divisors (see below), whose sum is σ = 34620662160. Its totient is φ = 9863737056.

The previous prime is 21401634253. The next prime is 21401634383. The reversal of 21401634358 is 85343610412.

It is a congruent number.

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, 562060 + ... + 598927.

It is an arithmetic number, because the mean of its divisors is an integer number (2163791385).

Almost surely, 2^21401634358 is an apocalyptic number.

21401634358 is a deficient number, since it is larger than the sum of its proper divisors (13219027802).

21401634358 is a wasteful number, since it uses less digits than its factorization.

21401634358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161711.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21401634358 in words is "twenty-one billion, four hundred one million, six hundred thirty-four thousand, three hundred fifty-eight".