20543765950 has 12 divisors (see below), whose sum is σ = 38211404760. Its totient is φ = 8217506360.

The previous prime is 20543765939. The next prime is 20543765951. The reversal of 20543765950 is 5956734502.

It is a self number, because there is not a number n which added to its sum of digits gives 20543765950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543765951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205437610 + ... + 205437709.

It is an arithmetic number, because the mean of its divisors is an integer number (3184283730).

Almost surely, 2^20543765950 is an apocalyptic number.

20543765950 is a deficient number, since it is larger than the sum of its proper divisors (17667638810).

20543765950 is a wasteful number, since it uses less digits than its factorization.

20543765950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410875331 (or 410875326 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 20543765950 in words is "twenty billion, five hundred forty-three million, seven hundred sixty-five thousand, nine hundred fifty".