20280325632 has 160 divisors (see below), whose sum is σ = 62165664000. Its totient is φ = 5755035648.

The previous prime is 20280325613. The next prime is 20280325651. The reversal of 20280325632 is 23652308202.

It is an interprime number because it is at equal distance from previous prime (20280325613) and next prime (20280325651).

It is a super-2 number, since 2×20280325632² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20280325593 and 20280325602.

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, 1595719 + ... + 1608377.

It is an arithmetic number, because the mean of its divisors is an integer number (388535400).

Almost surely, 2^20280325632 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 20280325632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31082832000).

20280325632 is an abundant number, since it is smaller than the sum of its proper divisors (41885338368).

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

20280325632 is a wasteful number, since it uses less digits than its factorization.

20280325632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12836 (or 12820 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20280325632 in words is "twenty billion, two hundred eighty million, three hundred twenty-five thousand, six hundred thirty-two".