20400503235 has 16 divisors (see below), whose sum is σ = 37303777536. Its totient is φ = 9325944288.

The previous prime is 20400503197. The next prime is 20400503237. The reversal of 20400503235 is 53230500402.

It is not a de Polignac number, because 20400503235 - 2¹³ = 20400495043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20400503237) 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, 97145149 + ... + 97145358.

It is an arithmetic number, because the mean of its divisors is an integer number (2331486096).

Almost surely, 2^20400503235 is an apocalyptic number.

20400503235 is a deficient number, since it is larger than the sum of its proper divisors (16903274301).

20400503235 is a wasteful number, since it uses less digits than its factorization.

20400503235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194290522.

The product of its (nonzero) digits is 3600, while the sum is 24.

The spelling of 20400503235 in words is "twenty billion, four hundred million, five hundred three thousand, two hundred thirty-five".