21275151448 has 32 divisors (see below), whose sum is σ = 42597648000. Its totient is φ = 9939444480.

The previous prime is 21275151431. The next prime is 21275151451. The reversal of 21275151448 is 84415157212.

It is a self number, because there is not a number n which added to its sum of digits gives 21275151448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471893 + ... + 1486276.

It is an arithmetic number, because the mean of its divisors is an integer number (1331176500).

Almost surely, 2^21275151448 is an apocalyptic number.

It is an amenable number.

21275151448 is an abundant number, since it is smaller than the sum of its proper divisors (21322496552).

21275151448 is a wasteful number, since it uses less digits than its factorization.

21275151448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958235 (or 2958231 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The spelling of 21275151448 in words is "twenty-one billion, two hundred seventy-five million, one hundred fifty-one thousand, four hundred forty-eight".