204693209040 has 80 divisors (see below), whose sum is σ = 634599436608. Its totient is φ = 54580512768.

The previous prime is 204693208987. The next prime is 204693209047. The reversal of 204693209040 is 40902396402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 204693209040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204693209047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972079 + ... + 4023281.

Almost surely, 2^204693209040 is an apocalyptic number.

204693209040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204693209040 is an abundant number, since it is smaller than the sum of its proper divisors (429906227568).

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

204693209040 is a wasteful number, since it uses less digits than its factorization.

204693209040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67876 (or 67870 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 204693209040 in words is "two hundred four billion, six hundred ninety-three million, two hundred nine thousand, forty".