21727377462 has 16 divisors (see below), whose sum is σ = 49662577152. Its totient is φ = 6207822120.

The previous prime is 21727377461. The next prime is 21727377509. The reversal of 21727377462 is 26477372712.

It is a super-2 number, since 2×21727377462² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21727377461) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 258659214 + ... + 258659297.

It is an arithmetic number, because the mean of its divisors is an integer number (3103911072).

Almost surely, 2^21727377462 is an apocalyptic number.

21727377462 is an abundant number, since it is smaller than the sum of its proper divisors (27935199690).

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

21727377462 is a wasteful number, since it uses less digits than its factorization.

21727377462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517318523.

The product of its digits is 1382976, while the sum is 48.

The spelling of 21727377462 in words is "twenty-one billion, seven hundred twenty-seven million, three hundred seventy-seven thousand, four hundred sixty-two".