20953361 has 8 divisors (see below), whose sum is σ = 24616704. Its totient is φ = 17583120.

The previous prime is 20953351. The next prime is 20953363. The reversal of 20953361 is 16335902.

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 20953361 - 2⁶ = 20953297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20953363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73121 + ... + 73406.

It is an arithmetic number, because the mean of its divisors is an integer number (3077088).

Almost surely, 2^20953361 is an apocalyptic number.

It is an amenable number.

20953361 is a deficient number, since it is larger than the sum of its proper divisors (3663343).

20953361 is a wasteful number, since it uses less digits than its factorization.

20953361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146551.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 20953361 is about 4577.4841343253. The cubic root of 20953361 is about 275.6880226547.

The spelling of 20953361 in words is "twenty million, nine hundred fifty-three thousand, three hundred sixty-one".