20440421149 has 8 divisors (see below), whose sum is σ = 21422280960. Its totient is φ = 19466323536.

The previous prime is 20440421083. The next prime is 20440421159. The reversal of 20440421149 is 94112404402.

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

It is a cyclic number.

It is not a de Polignac number, because 20440421149 - 2²⁹ = 19903550237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20440421149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440421159) 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, 1935157 + ... + 1945690.

It is an arithmetic number, because the mean of its divisors is an integer number (2677785120).

Almost surely, 2^20440421149 is an apocalyptic number.

It is an amenable number.

20440421149 is a deficient number, since it is larger than the sum of its proper divisors (981859811).

20440421149 is a wasteful number, since it uses less digits than its factorization.

20440421149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881099.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 20440421149 in words is "twenty billion, four hundred forty million, four hundred twenty-one thousand, one hundred forty-nine".