21972702 has 16 divisors (see below), whose sum is σ = 46258560. Its totient is φ = 6938712.

The previous prime is 21972701. The next prime is 21972733. The reversal of 21972702 is 20727912.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21972702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21972701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96258 + ... + 96485.

It is an arithmetic number, because the mean of its divisors is an integer number (2891160).

Almost surely, 2^21972702 is an apocalyptic number.

21972702 is an abundant number, since it is smaller than the sum of its proper divisors (24285858).

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

21972702 is a wasteful number, since it uses less digits than its factorization.

21972702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192767.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 21972702 is about 4687.5048799975. The cubic root of 21972702 is about 280.0879910531.

The spelling of 21972702 in words is "twenty-one million, nine hundred seventy-two thousand, seven hundred two".