20025731540 has 96 divisors (see below), whose sum is σ = 45388062720. Its totient is φ = 7400131200.

The previous prime is 20025731533. The next prime is 20025731573. The reversal of 20025731540 is 4513752002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9396275 + ... + 9398405.

It is an arithmetic number, because the mean of its divisors is an integer number (472792320).

Almost surely, 2^20025731540 is an apocalyptic number.

20025731540 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 20025731540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22694031360).

20025731540 is an abundant number, since it is smaller than the sum of its proper divisors (25362331180).

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

20025731540 is a wasteful number, since it uses less digits than its factorization.

20025731540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853 (or 2851 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The spelling of 20025731540 in words is "twenty billion, twenty-five million, seven hundred thirty-one thousand, five hundred forty".