20002956 has 12 divisors (see below), whose sum is σ = 46673592. Its totient is φ = 6667648.

The previous prime is 20002951. The next prime is 20002979. The reversal of 20002956 is 65920002.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20002951) 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, 833445 + ... + 833468.

It is an arithmetic number, because the mean of its divisors is an integer number (3889466).

Almost surely, 2^20002956 is an apocalyptic number.

It is an amenable number.

20002956 is an abundant number, since it is smaller than the sum of its proper divisors (26670636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002956 is a wasteful number, since it uses less digits than its factorization.

20002956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666920 (or 1666918 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20002956 is about 4472.4664336359. The cubic root of 20002956 is about 271.4551340315.

Adding to 20002956 its reverse (65920002), we get a palindrome (85922958).

The spelling of 20002956 in words is "twenty million, two thousand, nine hundred fifty-six".