20263057 has 4 divisors (see below), whose sum is σ = 20916736. Its totient is φ = 19609380.

The previous prime is 20263049. The next prime is 20263073. The reversal of 20263057 is 75036202.

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 not a de Polignac number, because 20263057 - 2³ = 20263049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20263007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326793 + ... + 326854.

It is an arithmetic number, because the mean of its divisors is an integer number (5229184).

Almost surely, 2^20263057 is an apocalyptic number.

It is an amenable number.

20263057 is a deficient number, since it is larger than the sum of its proper divisors (653679).

20263057 is an equidigital number, since it uses as much as digits as its factorization.

20263057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653678.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20263057 is about 4501.4505439913. The cubic root of 20263057 is about 272.6266594086.

Adding to 20263057 its reverse (75036202), we get a palindrome (95299259).

The spelling of 20263057 in words is "twenty million, two hundred sixty-three thousand, fifty-seven".