21352554235020 has 96 divisors (see below), whose sum is σ = 63304938341568. Its totient is φ = 5358996652032.

The previous prime is 21352554234967. The next prime is 21352554235021. The reversal of 21352554235020 is 2053245525312.

It is a self number, because there is not a number n which added to its sum of digits gives 21352554235020.

It is not an unprimeable number, because it can be changed into a prime (21352554235021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119043324 + ... + 119222556.

It is an arithmetic number, because the mean of its divisors is an integer number (659426441058).

Almost surely, 2^{21352554235020} is an apocalyptic number.

21352554235020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21352554235020 is an abundant number, since it is smaller than the sum of its proper divisors (41952384106548).

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

21352554235020 is a wasteful number, since it uses less digits than its factorization.

21352554235020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296059 (or 296057 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 39.

The spelling of 21352554235020 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred fifty-four million, two hundred thirty-five thousand, twenty".