20406242366 has 16 divisors (see below), whose sum is σ = 32590985040. Its totient is φ = 9549287040.

The previous prime is 20406242347. The next prime is 20406242393. The reversal of 20406242366 is 66324260402.

It is a congruent number.

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, 1670405 + ... + 1682576.

It is an arithmetic number, because the mean of its divisors is an integer number (2036936565).

Almost surely, 2^20406242366 is an apocalyptic number.

20406242366 is a deficient number, since it is larger than the sum of its proper divisors (12184742674).

20406242366 is a wasteful number, since it uses less digits than its factorization.

20406242366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353179.

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 20406242366 in words is "twenty billion, four hundred six million, two hundred forty-two thousand, three hundred sixty-six".