20968694 has 4 divisors (see below), whose sum is σ = 31453044. Its totient is φ = 10484346.

The previous prime is 20968693. The next prime is 20968699. The reversal of 20968694 is 49686902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49686902 = 2 ⋅24843451.

It is a super-2 number, since 2×20968694² = 879372256131272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20968693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5242172 + ... + 5242175.

It is an arithmetic number, because the mean of its divisors is an integer number (7863261).

Almost surely, 2^20968694 is an apocalyptic number.

20968694 is a deficient number, since it is larger than the sum of its proper divisors (10484350).

20968694 is a wasteful number, since it uses less digits than its factorization.

20968694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10484349.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 20968694 is about 4579.1586563473. The cubic root of 20968694 is about 275.7552528201.

The spelling of 20968694 in words is "twenty million, nine hundred sixty-eight thousand, six hundred ninety-four".