202120024340 has 48 divisors (see below), whose sum is σ = 457621572240. Its totient is φ = 74544138240.

The previous prime is 202120024333. The next prime is 202120024387. The reversal of 202120024340 is 43420021202.

It can be written as a sum of positive squares in 8 ways, for example, as 17745969796 + 184374054544 = 133214^2 + 429388^2 .

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

It is a congruent number.

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, 212135 + ... + 670254.

It is an arithmetic number, because the mean of its divisors is an integer number (9533782755).

Almost surely, 2^202120024340 is an apocalyptic number.

202120024340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120024340 is an abundant number, since it is smaller than the sum of its proper divisors (255501547900).

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

202120024340 is a wasteful number, since it uses less digits than its factorization.

202120024340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883292 (or 883290 counting only the distinct ones).

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

Adding to 202120024340 its reverse (43420021202), we get a palindrome (245540045542).

The spelling of 202120024340 in words is "two hundred two billion, one hundred twenty million, twenty-four thousand, three hundred forty".