20764419259808 has 96 divisors (see below), whose sum is σ = 47744944902144. Its totient is φ = 8704044156672.

The previous prime is 20764419259783. The next prime is 20764419259823. The reversal of 20764419259808 is 80895291446702.

It is a super-2 number, since 2×20764419259808² (a number of 27 digits) contains 22 as substring.

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, 15605591 + ... + 16883817.

It is an arithmetic number, because the mean of its divisors is an integer number (497343176064).

Almost surely, 2^{20764419259808} is an apocalyptic number.

20764419259808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20764419259808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23872472451072).

20764419259808 is an abundant number, since it is smaller than the sum of its proper divisors (26980525642336).

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

20764419259808 is a wasteful number, since it uses less digits than its factorization.

20764419259808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279834 (or 1279826 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 20764419259808 in words is "twenty trillion, seven hundred sixty-four billion, four hundred nineteen million, two hundred fifty-nine thousand, eight hundred eight".