22515023000 has 128 divisors (see below), whose sum is σ = 53695923840. Its totient is φ = 8834560000.

The previous prime is 22515022993. The next prime is 22515023017. The reversal of 22515023000 is 32051522.

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

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, 16542320 + ... + 16543680.

It is an arithmetic number, because the mean of its divisors is an integer number (419499405).

Almost surely, 2^22515023000 is an apocalyptic number.

22515023000 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 22515023000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26847961920).

22515023000 is an abundant number, since it is smaller than the sum of its proper divisors (31180900840).

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

22515023000 is a wasteful number, since it uses less digits than its factorization.

22515023000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 22515023000 its reverse (32051522), we get a palindrome (22547074522).

The spelling of 22515023000 in words is "twenty-two billion, five hundred fifteen million, twenty-three thousand".