208419920831 has 16 divisors (see below), whose sum is σ = 222878822400. Its totient is φ = 194206309248.

The previous prime is 208419920827. The next prime is 208419920833. The reversal of 208419920831 is 138029914802.

It is not a de Polignac number, because 208419920831 - 2² = 208419920827 is a prime.

It is a super-2 number, since 2×208419920831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208419920833) 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, 8180210 + ... + 8205648.

It is an arithmetic number, because the mean of its divisors is an integer number (13929926400).

Almost surely, 2^208419920831 is an apocalyptic number.

208419920831 is a deficient number, since it is larger than the sum of its proper divisors (14458901569).

208419920831 is a wasteful number, since it uses less digits than its factorization.

208419920831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30238.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 208419920831 in words is "two hundred eight billion, four hundred nineteen million, nine hundred twenty thousand, eight hundred thirty-one".