1005040020642 has 32 divisors (see below), whose sum is σ = 2297581095552. Its totient is φ = 287110946304.

The previous prime is 1005040020631. The next prime is 1005040020653. The reversal of 1005040020642 is 2460200405001.

It is an interprime number because it is at equal distance from previous prime (1005040020631) and next prime (1005040020653).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523983 + ... + 2081490.

It is an arithmetic number, because the mean of its divisors is an integer number (71799409236).

Almost surely, 2^{1005040020642} is an apocalyptic number.

1005040020642 is an abundant number, since it is smaller than the sum of its proper divisors (1292541074910).

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

1005040020642 is a wasteful number, since it uses less digits than its factorization.

1005040020642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612122.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 1005040020642 its reverse (2460200405001), we get a palindrome (3465240425643).

The spelling of 1005040020642 in words is "one trillion, five billion, forty million, twenty thousand, six hundred forty-two".