20354066642 has 32 divisors (see below), whose sum is σ = 37998979200. Its totient is φ = 7961678208.

The previous prime is 20354066639. The next prime is 20354066657. The reversal of 20354066642 is 24666045302.

It is a junction number, because it is equal to n+sod(n) for n = 20354066596 and 20354066605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612092 + ... + 644487.

It is an arithmetic number, because the mean of its divisors is an integer number (1187468100).

Almost surely, 2^20354066642 is an apocalyptic number.

20354066642 is a deficient number, since it is larger than the sum of its proper divisors (17644912558).

20354066642 is a wasteful number, since it uses less digits than its factorization.

20354066642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256690.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 20354066642 in words is "twenty billion, three hundred fifty-four million, sixty-six thousand, six hundred forty-two".