20257853746 has 32 divisors (see below), whose sum is σ = 33067077120. Its totient is φ = 9252090624.

The previous prime is 20257853731. The next prime is 20257853747. The reversal of 20257853746 is 64735875202.

It is a self number, because there is not a number n which added to its sum of digits gives 20257853746.

It is not an unprimeable number, because it can be changed into a prime (20257853747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930911 + ... + 1941373.

It is an arithmetic number, because the mean of its divisors is an integer number (1033346160).

Almost surely, 2^20257853746 is an apocalyptic number.

20257853746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20257853746 is a deficient number, since it is larger than the sum of its proper divisors (12809223374).

20257853746 is a wasteful number, since it uses less digits than its factorization.

20257853746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11250.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 20257853746 in words is "twenty billion, two hundred fifty-seven million, eight hundred fifty-three thousand, seven hundred forty-six".