20403102434 has 32 divisors (see below), whose sum is σ = 36285036480. Its totient is φ = 8482190400.

The previous prime is 20403102431. The next prime is 20403102451. The reversal of 20403102434 is 43420130402.

It is not an unprimeable number, because it can be changed into a prime (20403102431) 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, 296072 + ... + 358419.

It is an arithmetic number, because the mean of its divisors is an integer number (1133907390).

Almost surely, 2^20403102434 is an apocalyptic number.

20403102434 is a deficient number, since it is larger than the sum of its proper divisors (15881934046).

20403102434 is a wasteful number, since it uses less digits than its factorization.

20403102434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654626.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20403102434 its reverse (43420130402), we get a palindrome (63823232836).

The spelling of 20403102434 in words is "twenty billion, four hundred three million, one hundred two thousand, four hundred thirty-four".