20953051 has 8 divisors (see below), whose sum is σ = 24772320. Its totient is φ = 17340288.

The previous prime is 20953019. The next prime is 20953081. The reversal of 20953051 is 15035902.

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

It is not a de Polignac number, because 20953051 - 2⁵ = 20953019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20953001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51406 + ... + 51811.

It is an arithmetic number, because the mean of its divisors is an integer number (3096540).

Almost surely, 2^20953051 is an apocalyptic number.

20953051 is a deficient number, since it is larger than the sum of its proper divisors (3819269).

20953051 is a wasteful number, since it uses less digits than its factorization.

20953051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103253.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20953051 is about 4577.4502728047. The cubic root of 20953051 is about 275.6866630684.

Adding to 20953051 its reverse (15035902), we get a palindrome (35988953).

The spelling of 20953051 in words is "twenty million, nine hundred fifty-three thousand, fifty-one".