21150226020 has 384 divisors, whose sum is σ = 75432591360. Its totient is φ = 4300807680.

The previous prime is 21150226007. The next prime is 21150226033. The reversal of 21150226020 is 2062205112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21150226007) and next prime (21150226033).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 60951487 + ... + 60951833.

It is an arithmetic number, because the mean of its divisors is an integer number (196439040).

Almost surely, 2^21150226020 is an apocalyptic number.

21150226020 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 21150226020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37716295680).

21150226020 is an abundant number, since it is smaller than the sum of its proper divisors (54282365340).

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

21150226020 is a wasteful number, since it uses less digits than its factorization.

21150226020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 21150226020 in words is "twenty-one billion, one hundred fifty million, two hundred twenty-six thousand, twenty".