20558247696 has 120 divisors (see below), whose sum is σ = 69621686784. Its totient is φ = 5528263680.

The previous prime is 20558247667. The next prime is 20558247701. The reversal of 20558247696 is 69674285502.

20558247696 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 82 + 476 + 96 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582720 + ... + 616991.

Almost surely, 2^20558247696 is an apocalyptic number.

It is an amenable number.

20558247696 is an abundant number, since it is smaller than the sum of its proper divisors (49063439088).

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

20558247696 is a wasteful number, since it uses less digits than its factorization.

20558247696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199749 (or 1199740 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 20558247696 in words is "twenty billion, five hundred fifty-eight million, two hundred forty-seven thousand, six hundred ninety-six".