20754286521864 has 64 divisors (see below), whose sum is σ = 59345061350400. Its totient is φ = 5925086163264.

The previous prime is 20754286521841. The next prime is 20754286521883. The reversal of 20754286521864 is 46812568245702.

It is a junction number, because it is equal to n+sod(n) for n = 20754286521798 and 20754286521807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48850212 + ... + 49273235.

It is an arithmetic number, because the mean of its divisors is an integer number (927266583600).

Almost surely, 2^{20754286521864} is an apocalyptic number.

20754286521864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20754286521864 is an abundant number, since it is smaller than the sum of its proper divisors (38590774828536).

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

20754286521864 is a wasteful number, since it uses less digits than its factorization.

20754286521864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98124722 (or 98124718 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 60.

The spelling of 20754286521864 in words is "twenty trillion, seven hundred fifty-four billion, two hundred eighty-six million, five hundred twenty-one thousand, eight hundred sixty-four".