20630131431235 has 16 divisors (see below), whose sum is σ = 25556127075072. Its totient is φ = 15970849891200.

The previous prime is 20630131431179. The next prime is 20630131431251. The reversal of 20630131431235 is 53213413103602.

It is not a de Polignac number, because 20630131431235 - 2⁹ = 20630131430723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20630131431235.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723796 + ... + 6464065.

It is an arithmetic number, because the mean of its divisors is an integer number (1597257942192).

Almost surely, 2^{20630131431235} is an apocalyptic number.

20630131431235 is a deficient number, since it is larger than the sum of its proper divisors (4925995643837).

20630131431235 is a wasteful number, since it uses less digits than its factorization.

20630131431235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206414.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 20630131431235 its reverse (53213413103602), we get a palindrome (73843544534837).

The spelling of 20630131431235 in words is "twenty trillion, six hundred thirty billion, one hundred thirty-one million, four hundred thirty-one thousand, two hundred thirty-five".