209019933572 has 24 divisors (see below), whose sum is σ = 372376989600. Its totient is φ = 102642958080.

The previous prime is 209019933571. The next prime is 209019933581. The reversal of 209019933572 is 275339910902.

It is a self number, because there is not a number n which added to its sum of digits gives 209019933572.

It is not an unprimeable number, because it can be changed into a prime (209019933571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2005322 + ... + 2106977.

It is an arithmetic number, because the mean of its divisors is an integer number (15515707900).

Almost surely, 2^209019933572 is an apocalyptic number.

It is an amenable number.

209019933572 is a deficient number, since it is larger than the sum of its proper divisors (163357056028).

209019933572 is a wasteful number, since it uses less digits than its factorization.

209019933572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112531 (or 4112529 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 209019933572 in words is "two hundred nine billion, nineteen million, nine hundred thirty-three thousand, five hundred seventy-two".