21379662 has 24 divisors (see below), whose sum is σ = 46977840. Its totient is φ = 7025760.

The previous prime is 21379619. The next prime is 21379663. The reversal of 21379662 is 26697312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21379663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7087 + ... + 9642.

It is an arithmetic number, because the mean of its divisors is an integer number (1957410).

Almost surely, 2^21379662 is an apocalyptic number.

21379662 is an abundant number, since it is smaller than the sum of its proper divisors (25598178).

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

21379662 is a wasteful number, since it uses less digits than its factorization.

21379662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16808 (or 16805 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 21379662 is about 4623.8146589153. The cubic root of 21379662 is about 277.5451302300.

The spelling of 21379662 in words is "twenty-one million, three hundred seventy-nine thousand, six hundred sixty-two".