20455156887320 has 16 divisors (see below), whose sum is σ = 46024102996560. Its totient is φ = 8182062754912.

The previous prime is 20455156887287. The next prime is 20455156887353. The reversal of 20455156887320 is 2378865155402.

It is an interprime number because it is at equal distance from previous prime (20455156887287) and next prime (20455156887353).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255689461052 + ... + 255689461131.

It is an arithmetic number, because the mean of its divisors is an integer number (2876506437285).

Almost surely, 2^{20455156887320} is an apocalyptic number.

20455156887320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20455156887320 is an abundant number, since it is smaller than the sum of its proper divisors (25568946109240).

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

20455156887320 is a wasteful number, since it uses less digits than its factorization.

20455156887320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511378922194 (or 511378922190 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 56.

The spelling of 20455156887320 in words is "twenty trillion, four hundred fifty-five billion, one hundred fifty-six million, eight hundred eighty-seven thousand, three hundred twenty".