21892701 has 4 divisors (see below), whose sum is σ = 29190272. Its totient is φ = 14595132.

The previous prime is 21892697. The next prime is 21892723. The reversal of 21892701 is 10729812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21892701 - 2² = 21892697 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21892771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3648781 + ... + 3648786.

It is an arithmetic number, because the mean of its divisors is an integer number (7297568).

Almost surely, 2^21892701 is an apocalyptic number.

It is an amenable number.

21892701 is a deficient number, since it is larger than the sum of its proper divisors (7297571).

21892701 is an equidigital number, since it uses as much as digits as its factorization.

21892701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297570.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 21892701 is about 4678.9636673092. The cubic root of 21892701 is about 279.7476510411.

The spelling of 21892701 in words is "twenty-one million, eight hundred ninety-two thousand, seven hundred one".