20506235502 has 16 divisors (see below), whose sum is σ = 41220658512. Its totient is φ = 6800713920.

The previous prime is 20506235483. The next prime is 20506235573. The reversal of 20506235502 is 20553260502.

It is a self number, because there is not a number n which added to its sum of digits gives 20506235502.

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, 8673199 + ... + 8675562.

It is an arithmetic number, because the mean of its divisors is an integer number (2576291157).

Almost surely, 2^20506235502 is an apocalyptic number.

20506235502 is an abundant number, since it is smaller than the sum of its proper divisors (20714423010).

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

20506235502 is a wasteful number, since it uses less digits than its factorization.

20506235502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17348963.

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 20506235502 in words is "twenty billion, five hundred six million, two hundred thirty-five thousand, five hundred two".