20505371234 has 8 divisors (see below), whose sum is σ = 30758802780. Its totient is φ = 10252436976.

The previous prime is 20505371207. The next prime is 20505371261. The reversal of 20505371234 is 43217350502.

It is an interprime number because it is at equal distance from previous prime (20505371207) and next prime (20505371261).

It can be written as a sum of positive squares in 2 ways, for example, as 20448142009 + 57229225 = 142997^2 + 7565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20505371234.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6152 + ... + 202604.

Almost surely, 2^20505371234 is an apocalyptic number.

20505371234 is a deficient number, since it is larger than the sum of its proper divisors (10253431546).

20505371234 is a wasteful number, since it uses less digits than its factorization.

20505371234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248644.

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 20505371234 in words is "twenty billion, five hundred five million, three hundred seventy-one thousand, two hundred thirty-four".