21145077462 has 96 divisors (see below), whose sum is σ = 47082580992. Its totient is φ = 6317572096.

The previous prime is 21145077451. The next prime is 21145077509. The reversal of 21145077462 is 26477054112.

It is a super-2 number, since 2×21145077462² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21145077462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10248643 + ... + 10250705.

It is an arithmetic number, because the mean of its divisors is an integer number (490443552).

Almost surely, 2^21145077462 is an apocalyptic number.

21145077462 is an abundant number, since it is smaller than the sum of its proper divisors (25937503530).

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

21145077462 is a wasteful number, since it uses less digits than its factorization.

21145077462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382 (or 2365 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 21145077462 in words is "twenty-one billion, one hundred forty-five million, seventy-seven thousand, four hundred sixty-two".