20240398821 has 8 divisors (see below), whose sum is σ = 27857753344. Its totient is φ = 13058321760.

The previous prime is 20240398817. The next prime is 20240398861. The reversal of 20240398821 is 12889304202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20240398821 - 2² = 20240398817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20240398821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20240398861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108819256 + ... + 108819441.

It is an arithmetic number, because the mean of its divisors is an integer number (3482219168).

Almost surely, 2^20240398821 is an apocalyptic number.

It is an amenable number.

20240398821 is a deficient number, since it is larger than the sum of its proper divisors (7617354523).

20240398821 is a wasteful number, since it uses less digits than its factorization.

20240398821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217638731.

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 20240398821 in words is "twenty billion, two hundred forty million, three hundred ninety-eight thousand, eight hundred twenty-one".