20302555532 has 48 divisors (see below), whose sum is σ = 41736609600. Its totient is φ = 8637503616.

The previous prime is 20302555513. The next prime is 20302555543. The reversal of 20302555532 is 23555520302.

It is a happy number.

It is a super-2 number, since 2×20302555532² (a number of 21 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, 133958 + ... + 241970.

It is an arithmetic number, because the mean of its divisors is an integer number (869512700).

Almost surely, 2^20302555532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20302555532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20868304800).

20302555532 is an abundant number, since it is smaller than the sum of its proper divisors (21434054068).

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

20302555532 is a wasteful number, since it uses less digits than its factorization.

20302555532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108175 (or 108159 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 32.

The spelling of 20302555532 in words is "twenty billion, three hundred two million, five hundred fifty-five thousand, five hundred thirty-two".