21151448262 has 96 divisors (see below), whose sum is σ = 54409065984. Its totient is φ = 5812732800.

The previous prime is 21151448251. The next prime is 21151448317. The reversal of 21151448262 is 26284415112.

21151448262 is a `hidden beast` number, since 2 + 1 + 1 + 514 + 4 + 82 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337953 + ... + 395619.

It is an arithmetic number, because the mean of its divisors is an integer number (566761104).

Almost surely, 2^21151448262 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21151448262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27204532992).

21151448262 is an abundant number, since it is smaller than the sum of its proper divisors (33257617722).

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

21151448262 is a wasteful number, since it uses less digits than its factorization.

21151448262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57794 (or 57791 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The spelling of 21151448262 in words is "twenty-one billion, one hundred fifty-one million, four hundred forty-eight thousand, two hundred sixty-two".