202021402540 has 24 divisors (see below), whose sum is σ = 438874082640. Its totient is φ = 78022058688.

The previous prime is 202021402523. The next prime is 202021402573. The reversal of 202021402540 is 45204120202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174155802 + ... + 174156961.

It is an arithmetic number, because the mean of its divisors is an integer number (18286420110).

Almost surely, 2^202021402540 is an apocalyptic number.

202021402540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021402540 is an abundant number, since it is smaller than the sum of its proper divisors (236852680100).

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

202021402540 is a wasteful number, since it uses less digits than its factorization.

202021402540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348312801 (or 348312799 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 202021402540 its reverse (45204120202), we get a palindrome (247225522742).

The spelling of 202021402540 in words is "two hundred two billion, twenty-one million, four hundred two thousand, five hundred forty".