21967058 has 4 divisors (see below), whose sum is σ = 32950590. Its totient is φ = 10983528.

The previous prime is 21967037. The next prime is 21967073. The reversal of 21967058 is 85076912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20912329 + 1054729 = 4573^2 + 1027^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5491763 + ... + 5491766.

Almost surely, 2^21967058 is an apocalyptic number.

21967058 is a deficient number, since it is larger than the sum of its proper divisors (10983532).

21967058 is a wasteful number, since it uses less digits than its factorization.

21967058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10983531.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 21967058 is about 4686.9028152928. The cubic root of 21967058 is about 280.0640074757.

The spelling of 21967058 in words is "twenty-one million, nine hundred sixty-seven thousand, fifty-eight".