19539740950 has 48 divisors (see below), whose sum is σ = 37073430720. Its totient is φ = 7659828000.

The previous prime is 19539740887. The next prime is 19539740951. The reversal of 19539740950 is 5904793591.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19539740951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 966445 + ... + 986455.

It is an arithmetic number, because the mean of its divisors is an integer number (772363140).

Almost surely, 2^19539740950 is an apocalyptic number.

19539740950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19539740950 is a deficient number, since it is larger than the sum of its proper divisors (17533689770).

19539740950 is a wasteful number, since it uses less digits than its factorization.

19539740950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20413 (or 20408 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 19539740950 in words is "nineteen billion, five hundred thirty-nine million, seven hundred forty thousand, nine hundred fifty".