20715694 has 4 divisors (see below), whose sum is σ = 31073544. Its totient is φ = 10357846.

The previous prime is 20715691. The next prime is 20715697. The reversal of 20715694 is 49651702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49651702 = 2 ⋅24825851.

It is an interprime number because it is at equal distance from previous prime (20715691) and next prime (20715697).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20715691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5178922 + ... + 5178925.

It is an arithmetic number, because the mean of its divisors is an integer number (7768386).

Almost surely, 2^20715694 is an apocalyptic number.

20715694 is a deficient number, since it is larger than the sum of its proper divisors (10357850).

20715694 is a wasteful number, since it uses less digits than its factorization.

20715694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10357849.

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

The square root of 20715694 is about 4551.4496591745. The cubic root of 20715694 is about 274.6417108090.

The spelling of 20715694 in words is "twenty million, seven hundred fifteen thousand, six hundred ninety-four".