20734566986 has 32 divisors (see below), whose sum is σ = 36513711360. Its totient is φ = 8645270400.

The previous prime is 20734566971. The next prime is 20734566991. The reversal of 20734566986 is 68966543702.

It is a happy number.

It is a super-2 number, since 2×20734566986² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155756 + ... + 256376.

It is an arithmetic number, because the mean of its divisors is an integer number (1141053480).

Almost surely, 2^20734566986 is an apocalyptic number.

20734566986 is a deficient number, since it is larger than the sum of its proper divisors (15779144374).

20734566986 is a wasteful number, since it uses less digits than its factorization.

20734566986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101030.

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 20734566986 in words is "twenty billion, seven hundred thirty-four million, five hundred sixty-six thousand, nine hundred eighty-six".