20654957 has 8 divisors (see below), whose sum is σ = 21842400. Its totient is φ = 19477584.

The previous prime is 20654951. The next prime is 20654993. The reversal of 20654957 is 75945602.

It is a happy number.

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

It is not a de Polignac number, because 20654957 - 2⁴ = 20654941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20654957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654951) 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, 1919 + ... + 6707.

It is an arithmetic number, because the mean of its divisors is an integer number (2730300).

Almost surely, 2^20654957 is an apocalyptic number.

It is an amenable number.

20654957 is a deficient number, since it is larger than the sum of its proper divisors (1187443).

20654957 is a wasteful number, since it uses less digits than its factorization.

20654957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5035.

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

The square root of 20654957 is about 4544.7724915555. The cubic root of 20654957 is about 274.3730378144.

The spelling of 20654957 in words is "twenty million, six hundred fifty-four thousand, nine hundred fifty-seven".