20620705155554 has 16 divisors (see below), whose sum is σ = 35349938611200. Its totient is φ = 8837405480544.

The previous prime is 20620705155551. The next prime is 20620705155613. The reversal of 20620705155554 is 45555150702602.

It is a super-2 number, since 2×20620705155554² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20620705155499 and 20620705155508.

It is not an unprimeable number, because it can be changed into a prime (20620705155551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55862 + ... + 6422190.

It is an arithmetic number, because the mean of its divisors is an integer number (2209371163200).

Almost surely, 2^{20620705155554} is an apocalyptic number.

20620705155554 is a deficient number, since it is larger than the sum of its proper divisors (14729233455646).

20620705155554 is a wasteful number, since it uses less digits than its factorization.

20620705155554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597697.

The product of its (nonzero) digits is 2100000, while the sum is 47.

The spelling of 20620705155554 in words is "twenty trillion, six hundred twenty billion, seven hundred five million, one hundred fifty-five thousand, five hundred fifty-four".