20643052 has 24 divisors (see below), whose sum is σ = 37943136. Its totient is φ = 9808128.

The previous prime is 20643043. The next prime is 20643061. The reversal of 20643052 is 25034602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20643043) and next prime (20643061).

It is a super-2 number, since 2×20643052² = 852271191749408, which contains 22 as substring.

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, 15268 + ... + 16564.

It is an arithmetic number, because the mean of its divisors is an integer number (1580964).

Almost surely, 2^20643052 is an apocalyptic number.

It is an amenable number.

20643052 is a deficient number, since it is larger than the sum of its proper divisors (17300084).

20643052 is a wasteful number, since it uses less digits than its factorization.

20643052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1495 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20643052 is about 4543.4625562450. The cubic root of 20643052 is about 274.3203137673.

Adding to 20643052 its reverse (25034602), we get a palindrome (45677654).

The spelling of 20643052 in words is "twenty million, six hundred forty-three thousand, fifty-two".