21357711058 has 16 divisors (see below), whose sum is σ = 32916532824. Its totient is φ = 10385781120.

The previous prime is 21357711049. The next prime is 21357711119. The reversal of 21357711058 is 85011775312.

It can be written as a sum of positive squares in 4 ways, for example, as 16691864809 + 4665846249 = 129197^2 + 68307^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21357711058.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115188 + ... + 236608.

Almost surely, 2^21357711058 is an apocalyptic number.

21357711058 is a deficient number, since it is larger than the sum of its proper divisors (11558821766).

21357711058 is a wasteful number, since it uses less digits than its factorization.

21357711058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123837.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 21357711058 in words is "twenty-one billion, three hundred fifty-seven million, seven hundred eleven thousand, fifty-eight".