20002957 has 8 divisors (see below), whose sum is σ = 22067640. Its totient is φ = 18013440.

The previous prime is 20002951. The next prime is 20002979. The reversal of 20002957 is 75920002.

It can be written as a sum of positive squares in 4 ways, for example, as 2937796 + 17065161 = 1714^2 + 4131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20002957 - 2¹¹ = 20000909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18232 + ... + 19297.

It is an arithmetic number, because the mean of its divisors is an integer number (2758455).

Almost surely, 2^20002957 is an apocalyptic number.

It is an amenable number.

20002957 is a deficient number, since it is larger than the sum of its proper divisors (2064683).

20002957 is a wasteful number, since it uses less digits than its factorization.

20002957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37583.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20002957 is about 4472.4665454311. The cubic root of 20002957 is about 271.4551385551.

Adding to 20002957 its reverse (75920002), we get a palindrome (95922959).

The spelling of 20002957 in words is "twenty million, two thousand, nine hundred fifty-seven".