102402020 has 96 divisors (see below), whose sum is σ = 261515520. Its totient is φ = 32901120.

The previous prime is 102402011. The next prime is 102402023. The reversal of 102402020 is 20204201.

It is a junction number, because it is equal to n+sod(n) for n = 102401992 and 102402010.

It is not an unprimeable number, because it can be changed into a prime (102402023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364280 + ... + 364560.

It is an arithmetic number, because the mean of its divisors is an integer number (2724120).

Almost surely, 2^102402020 is an apocalyptic number.

102402020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102402020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130757760).

102402020 is an abundant number, since it is smaller than the sum of its proper divisors (159113500).

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

102402020 is a wasteful number, since it uses less digits than its factorization.

102402020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 102402020 is about 10119.3883214352. The cubic root of 102402020 is about 467.8459144042.

Adding to 102402020 its reverse (20204201), we get a palindrome (122606221).

The spelling of 102402020 in words is "one hundred two million, four hundred two thousand, twenty".