102820027394 has 24 divisors (see below), whose sum is σ = 185597028540. Its totient is φ = 42546217056.

The previous prime is 102820027393. The next prime is 102820027397. The reversal of 102820027394 is 493720028201.

It can be written as a sum of positive squares in 2 ways, for example, as 95472966169 + 7347061225 = 308987^2 + 85715^2 .

It is not an unprimeable number, because it can be changed into a prime (102820027393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18086537 + ... + 18092220.

Almost surely, 2^102820027394 is an apocalyptic number.

102820027394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

102820027394 is a deficient number, since it is larger than the sum of its proper divisors (82777001146).

102820027394 is a wasteful number, since it uses less digits than its factorization.

102820027394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36178802 (or 36178795 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 102820027394 in words is "one hundred two billion, eight hundred twenty million, twenty-seven thousand, three hundred ninety-four".