20455251008558 has 16 divisors (see below), whose sum is σ = 30982384998240. Its totient is φ = 10127799704736.

The previous prime is 20455251008519. The next prime is 20455251008611. The reversal of 20455251008558 is 85580015255402.

It is a super-2 number, since 2×20455251008558² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381928 + ... + 6543716.

It is an arithmetic number, because the mean of its divisors is an integer number (1936399062390).

Almost surely, 2^{20455251008558} is an apocalyptic number.

20455251008558 is a deficient number, since it is larger than the sum of its proper divisors (10527133989682).

20455251008558 is a wasteful number, since it uses less digits than its factorization.

20455251008558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181131.

The product of its (nonzero) digits is 3200000, while the sum is 50.

The spelling of 20455251008558 in words is "twenty trillion, four hundred fifty-five billion, two hundred fifty-one million, eight thousand, five hundred fifty-eight".