20764043 has 4 divisors (see below), whose sum is σ = 20776728. Its totient is φ = 20751360.

The previous prime is 20764039. The next prime is 20764049. The reversal of 20764043 is 34046702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34046702 = 2 ⋅17023351.

It is a cyclic number.

It is not a de Polignac number, because 20764043 - 2² = 20764039 is a prime.

It is a super-2 number, since 2×20764043² = 862290963411698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20764049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3446 + ... + 7307.

It is an arithmetic number, because the mean of its divisors is an integer number (5194182).

Almost surely, 2^20764043 is an apocalyptic number.

20764043 is a deficient number, since it is larger than the sum of its proper divisors (12685).

20764043 is a wasteful number, since it uses less digits than its factorization.

20764043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20764043 is about 4556.7579483664. The cubic root of 20764043 is about 274.8552097303.

The spelling of 20764043 in words is "twenty million, seven hundred sixty-four thousand, forty-three".