102423402020 has 48 divisors (see below), whose sum is σ = 215867695680. Its totient is φ = 40821331584.

The previous prime is 102423401999. The next prime is 102423402023. The reversal of 102423402020 is 20204324201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 102423401983 and 102423402001.

It is not an unprimeable number, because it can be changed into a prime (102423402023) 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, 6614327 + ... + 6629793.

It is an arithmetic number, because the mean of its divisors is an integer number (4497243660).

Almost surely, 2^102423402020 is an apocalyptic number.

102423402020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102423402020 is an abundant number, since it is smaller than the sum of its proper divisors (113444293660).

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

102423402020 is a wasteful number, since it uses less digits than its factorization.

102423402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16652 (or 16650 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 102423402020 its reverse (20204324201), we get a palindrome (122627726221).

The spelling of 102423402020 in words is "one hundred two billion, four hundred twenty-three million, four hundred two thousand, twenty".