20403423102 has 16 divisors (see below), whose sum is σ = 40890644352. Its totient is φ = 6787174680.

The previous prime is 20403423071. The next prime is 20403423127. The reversal of 20403423102 is 20132430402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3488424 + ... + 3494267.

It is an arithmetic number, because the mean of its divisors is an integer number (2555665272).

Almost surely, 2^20403423102 is an apocalyptic number.

20403423102 is an abundant number, since it is smaller than the sum of its proper divisors (20487221250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20403423102 is a wasteful number, since it uses less digits than its factorization.

20403423102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6983183.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20403423102 its reverse (20132430402), we get a palindrome (40535853504).

The spelling of 20403423102 in words is "twenty billion, four hundred three million, four hundred twenty-three thousand, one hundred two".