21202132020 has 48 divisors (see below), whose sum is σ = 59373699840. Its totient is φ = 5653165696.

The previous prime is 21202132019. The next prime is 21202132051. The reversal of 21202132020 is 2023120212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 566446 + ... + 602714.

It is an arithmetic number, because the mean of its divisors is an integer number (1236952080).

Almost surely, 2^21202132020 is an apocalyptic number.

21202132020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202132020 is an abundant number, since it is smaller than the sum of its proper divisors (38171567820).

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

21202132020 is a wasteful number, since it uses less digits than its factorization.

21202132020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46024 (or 46022 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21202132020 its reverse (2023120212), we get a palindrome (23225252232).

The spelling of 21202132020 in words is "twenty-one billion, two hundred two million, one hundred thirty-two thousand, twenty".