21148290156 has 96 divisors (see below), whose sum is σ = 60071058432. Its totient is φ = 5652817920.

The previous prime is 21148290127. The next prime is 21148290203. The reversal of 21148290156 is 65109284112.

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, 194136 + ... + 282816.

It is an arithmetic number, because the mean of its divisors is an integer number (625740192).

Almost surely, 2^21148290156 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 21148290156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30035529216).

21148290156 is an abundant number, since it is smaller than the sum of its proper divisors (38922768276).

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

21148290156 is a wasteful number, since it uses less digits than its factorization.

21148290156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88879 (or 88877 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 21148290156 in words is "twenty-one billion, one hundred forty-eight million, two hundred ninety thousand, one hundred fifty-six".