20479297401 has 48 divisors (see below), whose sum is σ = 32619834000. Its totient is φ = 12322996224.

The previous prime is 20479297387. The next prime is 20479297429. The reversal of 20479297401 is 10479297402.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2136658176 + 18342639225 = 46224^2 + 135435^2 .

It is not a de Polignac number, because 20479297401 - 2¹³ = 20479289209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20479297481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 645625 + ... + 676601.

It is an arithmetic number, because the mean of its divisors is an integer number (679579875).

Almost surely, 2^20479297401 is an apocalyptic number.

It is an amenable number.

20479297401 is a deficient number, since it is larger than the sum of its proper divisors (12140536599).

20479297401 is a wasteful number, since it uses less digits than its factorization.

20479297401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31178 (or 31175 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

Subtracting from 20479297401 its reverse (10479297402), we obtain a palindrome (9999999999).

The spelling of 20479297401 in words is "twenty billion, four hundred seventy-nine million, two hundred ninety-seven thousand, four hundred one".