21972414 has 8 divisors (see below), whose sum is σ = 43944840. Its totient is φ = 7324136.

The previous prime is 21972407. The next prime is 21972421. The reversal of 21972414 is 41427912.

It is an interprime number because it is at equal distance from previous prime (21972407) and next prime (21972421).

It is a sphenic number, since it is the product of 3 distinct primes.

21972414 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831029 + ... + 1831040.

It is an arithmetic number, because the mean of its divisors is an integer number (5493105).

Almost surely, 2^21972414 is an apocalyptic number.

21972414 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21972414 is a wasteful number, since it uses less digits than its factorization.

21972414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662074.

The product of its digits is 4032, while the sum is 30.

The square root of 21972414 is about 4687.4741599288. The cubic root of 21972414 is about 280.0867673272.

The spelling of 21972414 in words is "twenty-one million, nine hundred seventy-two thousand, four hundred fourteen".