20554722511620 has 48 divisors (see below), whose sum is σ = 62785334219328. Its totient is φ = 4982963032960.

The previous prime is 20554722511541. The next prime is 20554722511627. The reversal of 20554722511620 is 2611522745502.

It is not an unprimeable number, because it can be changed into a prime (20554722511627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15571758819 + ... + 15571760138.

It is an arithmetic number, because the mean of its divisors is an integer number (1308027796236).

Almost surely, 2^{20554722511620} is an apocalyptic number.

20554722511620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554722511620 is an abundant number, since it is smaller than the sum of its proper divisors (42230611707708).

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

20554722511620 is a wasteful number, since it uses less digits than its factorization.

20554722511620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31143518980 (or 31143518978 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 20554722511620 in words is "twenty trillion, five hundred fifty-four billion, seven hundred twenty-two million, five hundred eleven thousand, six hundred twenty".