21277674418 has 32 divisors (see below), whose sum is σ = 42852942720. Its totient is φ = 7652309760.

The previous prime is 21277674367. The next prime is 21277674421. The reversal of 21277674418 is 81447677212.

It is a super-3 number, since 3×21277674418³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5312103 + ... + 5316106.

It is an arithmetic number, because the mean of its divisors is an integer number (1339154460).

Almost surely, 2^21277674418 is an apocalyptic number.

21277674418 is an abundant number, since it is smaller than the sum of its proper divisors (21575268302).

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

21277674418 is a wasteful number, since it uses less digits than its factorization.

21277674418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10628242.

The product of its digits is 1053696, while the sum is 49.

The spelling of 21277674418 in words is "twenty-one billion, two hundred seventy-seven million, six hundred seventy-four thousand, four hundred eighteen".