102420253044 has 18 divisors (see below), whose sum is σ = 258895639730. Its totient is φ = 34140084336.

The previous prime is 102420253043. The next prime is 102420253051. The reversal of 102420253044 is 440352024201.

102420253044 is a `hidden beast` number, since 102 + 4 + 20 + 2 + 530 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 101896300944 + 523952100 = 319212^2 + 22890^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 102420252999 and 102420253017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102420253043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1422503479 + ... + 1422503550.

Almost surely, 2^102420253044 is an apocalyptic number.

It is an amenable number.

102420253044 is an abundant number, since it is smaller than the sum of its proper divisors (156475386686).

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

102420253044 is a wasteful number, since it uses less digits than its factorization.

102420253044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845007039 (or 2845007034 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 102420253044 its reverse (440352024201), we get a palindrome (542772277245).

The spelling of 102420253044 in words is "one hundred two billion, four hundred twenty million, two hundred fifty-three thousand, forty-four".