208520392742 has 16 divisors (see below), whose sum is σ = 322892500992. Its totient is φ = 100890021960.

The previous prime is 208520392741. The next prime is 208520392753. The reversal of 208520392742 is 247293025802.

It is a junction number, because it is equal to n+sod(n) for n = 208520392693 and 208520392702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208520392741) 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, 858233 + ... + 1074059.

It is an arithmetic number, because the mean of its divisors is an integer number (20180781312).

Almost surely, 2^208520392742 is an apocalyptic number.

208520392742 is a deficient number, since it is larger than the sum of its proper divisors (114372108250).

208520392742 is a wasteful number, since it uses less digits than its factorization.

208520392742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231443.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 208520392742 in words is "two hundred eight billion, five hundred twenty million, three hundred ninety-two thousand, seven hundred forty-two".