20400410403 has 24 divisors (see below), whose sum is σ = 29631114240. Its totient is φ = 13524781680.

The previous prime is 20400410369. The next prime is 20400410417. The reversal of 20400410403 is 30401400402.

It is not a de Polignac number, because 20400410403 - 2⁶ = 20400410339 is a prime.

It is a super-2 number, since 2×20400410403² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20400410473) 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, 2064288 + ... + 2074146.

It is an arithmetic number, because the mean of its divisors is an integer number (1234629760).

Almost surely, 2^20400410403 is an apocalyptic number.

20400410403 is a deficient number, since it is larger than the sum of its proper divisors (9230703837).

20400410403 is a wasteful number, since it uses less digits than its factorization.

20400410403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11119 (or 11116 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20400410403 its reverse (30401400402), we get a palindrome (50801810805).

The spelling of 20400410403 in words is "twenty billion, four hundred million, four hundred ten thousand, four hundred three".