20953099395520 has 112 divisors (see below), whose sum is σ = 52858546990848. Its totient is φ = 7883894865920.

The previous prime is 20953099395509. The next prime is 20953099395563. The reversal of 20953099395520 is 2559399035902.

It is a congruent number.

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, 8860710 + ... + 10973530.

Almost surely, 2^{20953099395520} is an apocalyptic number.

20953099395520 is a gapful number since it is divisible by the number (20) 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 20953099395520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26429273495424).

20953099395520 is an abundant number, since it is smaller than the sum of its proper divisors (31905447595328).

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

20953099395520 is a wasteful number, since it uses less digits than its factorization.

20953099395520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114678 (or 2114668 counting only the distinct ones).

The product of its (nonzero) digits is 29524500, while the sum is 61.

The spelling of 20953099395520 in words is "twenty trillion, nine hundred fifty-three billion, ninety-nine million, three hundred ninety-five thousand, five hundred twenty".