20405827002642 has 32 divisors (see below), whose sum is σ = 41019765336000. Its totient is φ = 6767258705088.

The previous prime is 20405827002607. The next prime is 20405827002721. The reversal of 20405827002642 is 24620072850402.

It is a junction number, because it is equal to n+sod(n) for n = 20405827002594 and 20405827002603.

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, 58392709 + ... + 58741127.

It is an arithmetic number, because the mean of its divisors is an integer number (1281867666750).

Almost surely, 2^{20405827002642} is an apocalyptic number.

20405827002642 is an abundant number, since it is smaller than the sum of its proper divisors (20613938333358).

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

20405827002642 is a wasteful number, since it uses less digits than its factorization.

20405827002642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398170.

The product of its (nonzero) digits is 430080, while the sum is 42.

The spelling of 20405827002642 in words is "twenty trillion, four hundred five billion, eight hundred twenty-seven million, two thousand, six hundred forty-two".