20546957 has 8 divisors (see below), whose sum is σ = 21021792. Its totient is φ = 20077200.

The previous prime is 20546947. The next prime is 20546959. The reversal of 20546957 is 75964502.

It is a happy number.

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 20546957 - 2⁴ = 20546941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20546957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20546959) 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, 7607 + ... + 9947.

It is an arithmetic number, because the mean of its divisors is an integer number (2627724).

Almost surely, 2^20546957 is an apocalyptic number.

It is an amenable number.

20546957 is a deficient number, since it is larger than the sum of its proper divisors (474835).

20546957 is a wasteful number, since it uses less digits than its factorization.

20546957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 20546957 is about 4532.8751361581. The cubic root of 20546957 is about 273.8939908164.

The spelling of 20546957 in words is "twenty million, five hundred forty-six thousand, nine hundred fifty-seven".