205514929720 has 32 divisors (see below), whose sum is σ = 474906124800. Its totient is φ = 79984188288.

The previous prime is 205514929717. The next prime is 205514929727. The reversal of 205514929720 is 27929415502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205514929727) 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, 69429240 + ... + 69432199.

It is an arithmetic number, because the mean of its divisors is an integer number (14840816400).

Almost surely, 2^205514929720 is an apocalyptic number.

205514929720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205514929720 is an abundant number, since it is smaller than the sum of its proper divisors (269391195080).

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

205514929720 is a wasteful number, since it uses less digits than its factorization.

205514929720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138861487 (or 138861483 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 205514929720 in words is "two hundred five billion, five hundred fourteen million, nine hundred twenty-nine thousand, seven hundred twenty".