20440006424 has 16 divisors (see below), whose sum is σ = 38850013320. Its totient is φ = 10080002880.

The previous prime is 20440006369. The next prime is 20440006427. The reversal of 20440006424 is 42460004402.

It is a super-2 number, since 2×20440006424² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20440006393 and 20440006402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440006427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17499422 + ... + 17500589.

Almost surely, 2^20440006424 is an apocalyptic number.

It is an amenable number.

20440006424 is a deficient number, since it is larger than the sum of its proper divisors (18410006896).

20440006424 is a wasteful number, since it uses less digits than its factorization.

20440006424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35000090 (or 35000086 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The spelling of 20440006424 in words is "twenty billion, four hundred forty million, six thousand, four hundred twenty-four".