20460557 has 8 divisors (see below), whose sum is σ = 22503936. Its totient is φ = 18484272.

The previous prime is 20460553. The next prime is 20460569. The reversal of 20460557 is 75506402.

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 20460557 - 2² = 20460553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20460553) 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, 16133 + ... + 17354.

It is an arithmetic number, because the mean of its divisors is an integer number (2812992).

Almost surely, 2^20460557 is an apocalyptic number.

It is an amenable number.

20460557 is a deficient number, since it is larger than the sum of its proper divisors (2043379).

20460557 is a wasteful number, since it uses less digits than its factorization.

20460557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33547.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20460557 is about 4523.3347211985. The cubic root of 20460557 is about 273.5095431634.

Adding to 20460557 its reverse (75506402), we get a palindrome (95966959).

The spelling of 20460557 in words is "twenty million, four hundred sixty thousand, five hundred fifty-seven".