21967045 has 8 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 17325840.

The previous prime is 21967037. The next prime is 21967073. The reversal of 21967045 is 54076912.

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

It is not a de Polignac number, because 21967045 - 2³ = 21967037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21967045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30585 + ... + 31294.

It is an arithmetic number, because the mean of its divisors is an integer number (3341520).

Almost surely, 2^21967045 is an apocalyptic number.

It is an amenable number.

21967045 is a deficient number, since it is larger than the sum of its proper divisors (4765115).

21967045 is an equidigital number, since it uses as much as digits as its factorization.

21967045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61955.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 21967045 is about 4686.9014284493. The cubic root of 21967045 is about 280.0639522289.

The spelling of 21967045 in words is "twenty-one million, nine hundred sixty-seven thousand, forty-five".