20946357 has 28 divisors (see below), whose sum is σ = 32003040. Its totient is φ = 13699368.

The previous prime is 20946347. The next prime is 20946361. The reversal of 20946357 is 75364902.

It is not a de Polignac number, because 20946357 - 2⁶ = 20946293 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20946347) 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 27 ways as a sum of consecutive naturals, for example, 42768 + ... + 43254.

Almost surely, 2^20946357 is an apocalyptic number.

20946357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20946357 is a deficient number, since it is larger than the sum of its proper divisors (11056683).

20946357 is an frugal number, since it uses more digits than its factorization.

20946357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20946357 is about 4576.7190213077. The cubic root of 20946357 is about 275.6573015038.

The spelling of 20946357 in words is "twenty million, nine hundred forty-six thousand, three hundred fifty-seven".