20475457401 has 24 divisors (see below), whose sum is σ = 31513003072. Its totient is φ = 11584296000.

The previous prime is 20475457399. The next prime is 20475457421. The reversal of 20475457401 is 10475457402.

It is not a de Polignac number, because 20475457401 - 2¹ = 20475457399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20475457401.

It is not an unprimeable number, because it can be changed into a prime (20475457421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166431 + ... + 262011.

Almost surely, 2^20475457401 is an apocalyptic number.

20475457401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20475457401 is a deficient number, since it is larger than the sum of its proper divisors (11037545671).

20475457401 is an equidigital number, since it uses as much as digits as its factorization.

20475457401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95793 (or 95692 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 39.

Subtracting from 20475457401 its reverse (10475457402), we obtain a palindrome (9999999999).

The spelling of 20475457401 in words is "twenty billion, four hundred seventy-five million, four hundred fifty-seven thousand, four hundred one".