21477677412 has 24 divisors (see below), whose sum is σ = 50165178112. Its totient is φ = 7151997600.

The previous prime is 21477677369. The next prime is 21477677489.

21477677412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21477677412² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891139 + ... + 914922.

Almost surely, 2^21477677412 is an apocalyptic number.

It is an amenable number.

21477677412 is an abundant number, since it is smaller than the sum of its proper divisors (28687500700).

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

21477677412 is a wasteful number, since it uses less digits than its factorization.

21477677412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807059 (or 1807057 counting only the distinct ones).

The product of its digits is 921984, while the sum is 48.

The spelling of 21477677412 in words is "twenty-one billion, four hundred seventy-seven million, six hundred seventy-seven thousand, four hundred twelve".