20402520000 has 140 divisors (see below), whose sum is σ = 67455888456. Its totient is φ = 5440640000.

The previous prime is 20402519993. The next prime is 20402520031. The reversal of 20402520000 is 2520402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34990 + ... + 205010.

Almost surely, 2^20402520000 is an apocalyptic number.

20402520000 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 20402520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33727944228).

20402520000 is an abundant number, since it is smaller than the sum of its proper divisors (47053368456).

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

20402520000 is an equidigital number, since it uses as much as digits as its factorization.

20402520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170056 (or 170031 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The spelling of 20402520000 in words is "twenty billion, four hundred two million, five hundred twenty thousand".