21404427762 has 32 divisors (see below), whose sum is σ = 47297768832. Its totient is φ = 6423152384.

The previous prime is 21404427761. The next prime is 21404427809. The reversal of 21404427762 is 26772440412.

It is a self number, because there is not a number n which added to its sum of digits gives 21404427762.

It is not an unprimeable number, because it can be changed into a prime (21404427761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4559553 + ... + 4564244.

It is an arithmetic number, because the mean of its divisors is an integer number (1478055276).

Almost surely, 2^21404427762 is an apocalyptic number.

21404427762 is an abundant number, since it is smaller than the sum of its proper divisors (25893341070).

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

21404427762 is a wasteful number, since it uses less digits than its factorization.

21404427762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9123842.

The product of its (nonzero) digits is 150528, while the sum is 39.

The spelling of 21404427762 in words is "twenty-one billion, four hundred four million, four hundred twenty-seven thousand, seven hundred sixty-two".