20952501 has 4 divisors (see below), whose sum is σ = 27936672. Its totient is φ = 13968332.

The previous prime is 20952479. The next prime is 20952521. The reversal of 20952501 is 10525902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20952501 - 2¹⁰ = 20951477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20952521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492081 + ... + 3492086.

It is an arithmetic number, because the mean of its divisors is an integer number (6984168).

Almost surely, 2^20952501 is an apocalyptic number.

It is an amenable number.

20952501 is a deficient number, since it is larger than the sum of its proper divisors (6984171).

20952501 is an equidigital number, since it uses as much as digits as its factorization.

20952501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984170.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 20952501 is about 4577.3901952969. The cubic root of 20952501 is about 275.6842508661.

The spelling of 20952501 in words is "twenty million, nine hundred fifty-two thousand, five hundred one".