20760457 has 4 divisors (see below), whose sum is σ = 20805760. Its totient is φ = 20715156.

The previous prime is 20760409. The next prime is 20760479. The reversal of 20760457 is 75406702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20760457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20767457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21957 + ... + 22882.

It is an arithmetic number, because the mean of its divisors is an integer number (5201440).

Almost surely, 2^20760457 is an apocalyptic number.

It is an amenable number.

20760457 is a deficient number, since it is larger than the sum of its proper divisors (45303).

20760457 is an equidigital number, since it uses as much as digits as its factorization.

20760457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45302.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20760457 is about 4556.3644498657. The cubic root of 20760457 is about 274.8393861014.

The spelling of 20760457 in words is "twenty million, seven hundred sixty thousand, four hundred fifty-seven".