21250076148 has 72 divisors (see below), whose sum is σ = 61563273408. Its totient is φ = 6054225408.

The previous prime is 21250076129. The next prime is 21250076153. The reversal of 21250076148 is 84167005212.

21250076148 is a `hidden beast` number, since 2 + 1 + 2 + 500 + 7 + 6 + 148 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30486 + ... + 208397.

It is an arithmetic number, because the mean of its divisors is an integer number (855045464).

Almost surely, 2^21250076148 is an apocalyptic number.

21250076148 is a gapful number since it is divisible by the number (28) 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 21250076148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30781636704).

21250076148 is an abundant number, since it is smaller than the sum of its proper divisors (40313197260).

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

21250076148 is a wasteful number, since it uses less digits than its factorization.

21250076148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239253 (or 239248 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 21250076148 in words is "twenty-one billion, two hundred fifty million, seventy-six thousand, one hundred forty-eight".