20420440001 has 32 divisors (see below), whose sum is σ = 24375085056. Its totient is φ = 16926336000.

The previous prime is 20420439989. The next prime is 20420440039. The reversal of 20420440001 is 10004402402.

It is a cyclic number.

It is not a de Polignac number, because 20420440001 - 2²² = 20416245697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20420490001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465431 + ... + 507411.

It is an arithmetic number, because the mean of its divisors is an integer number (761721408).

Almost surely, 2^20420440001 is an apocalyptic number.

It is an amenable number.

20420440001 is a deficient number, since it is larger than the sum of its proper divisors (3954645055).

20420440001 is a wasteful number, since it uses less digits than its factorization.

20420440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42113.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20420440001 its reverse (10004402402), we get a palindrome (30424842403).

The spelling of 20420440001 in words is "twenty billion, four hundred twenty million, four hundred forty thousand, one".