20200440642 has 16 divisors (see below), whose sum is σ = 40421319840. Its totient is φ = 6730073792.

The previous prime is 20200440641. The next prime is 20200440643. The reversal of 20200440642 is 24604400202.

It is an interprime number because it is at equal distance from previous prime (20200440641) and next prime (20200440643).

It is not an unprimeable number, because it can be changed into a prime (20200440641) 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, 838743 + ... + 862490.

It is an arithmetic number, because the mean of its divisors is an integer number (2526332490).

Almost surely, 2^20200440642 is an apocalyptic number.

20200440642 is an abundant number, since it is smaller than the sum of its proper divisors (20220879198).

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

20200440642 is a wasteful number, since it uses less digits than its factorization.

20200440642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703217.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20200440642 its reverse (24604400202), we get a palindrome (44804840844).

The spelling of 20200440642 in words is "twenty billion, two hundred million, four hundred forty thousand, six hundred forty-two".