20431266401 has 8 divisors (see below), whose sum is σ = 25146174144. Its totient is φ = 16165397520.

The previous prime is 20431266391. The next prime is 20431266407. The reversal of 20431266401 is 10466213402.

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 20431266401 - 2¹⁰ = 20431265377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20431266407) 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, 112259615 + ... + 112259796.

It is an arithmetic number, because the mean of its divisors is an integer number (3143271768).

Almost surely, 2^20431266401 is an apocalyptic number.

It is an amenable number.

20431266401 is a deficient number, since it is larger than the sum of its proper divisors (4714907743).

20431266401 is a wasteful number, since it uses less digits than its factorization.

20431266401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224519431.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 20431266401 its reverse (10466213402), we get a palindrome (30897479803).

The spelling of 20431266401 in words is "twenty billion, four hundred thirty-one million, two hundred sixty-six thousand, four hundred one".