202421243020 has 48 divisors (see below), whose sum is σ = 431266701600. Its totient is φ = 79792805376.

The previous prime is 202421243009. The next prime is 202421243041. The reversal of 202421243020 is 20342124202.

It is a junction number, because it is equal to n+sod(n) for n = 202421242982 and 202421243000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1713831 + ... + 1828129.

It is an arithmetic number, because the mean of its divisors is an integer number (8984722950).

Almost surely, 2^202421243020 is an apocalyptic number.

202421243020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202421243020 is an abundant number, since it is smaller than the sum of its proper divisors (228845458580).

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

202421243020 is a wasteful number, since it uses less digits than its factorization.

202421243020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115594 (or 115592 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 202421243020 its reverse (20342124202), we get a palindrome (222763367222).

The spelling of 202421243020 in words is "two hundred two billion, four hundred twenty-one million, two hundred forty-three thousand, twenty".