20002322540 has 24 divisors (see below), whose sum is σ = 43453322640. Its totient is φ = 7725034688.

The previous prime is 20002322537. The next prime is 20002322551. The reversal of 20002322540 is 4522320002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17242802 + ... + 17243961.

It is an arithmetic number, because the mean of its divisors is an integer number (1810555110).

Almost surely, 2^20002322540 is an apocalyptic number.

20002322540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002322540 is an abundant number, since it is smaller than the sum of its proper divisors (23451000100).

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

20002322540 is a wasteful number, since it uses less digits than its factorization.

20002322540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34486801 (or 34486799 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

Adding to 20002322540 its reverse (4522320002), we get a palindrome (24524642542).

The spelling of 20002322540 in words is "twenty billion, two million, three hundred twenty-two thousand, five hundred forty".