20040340242 has 16 divisors (see below), whose sum is σ = 43163809920. Its totient is φ = 6166258512.

The previous prime is 20040340237. The next prime is 20040340261. The reversal of 20040340242 is 24204304002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128463642 + ... + 128463797.

It is an arithmetic number, because the mean of its divisors is an integer number (2697738120).

Almost surely, 2^20040340242 is an apocalyptic number.

20040340242 is an abundant number, since it is smaller than the sum of its proper divisors (23123469678).

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

20040340242 is a wasteful number, since it uses less digits than its factorization.

20040340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256927457.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20040340242 its reverse (24204304002), we get a palindrome (44244644244).

The spelling of 20040340242 in words is "twenty billion, forty million, three hundred forty thousand, two hundred forty-two".