20706199894 has 8 divisors (see below), whose sum is σ = 31059928728. Its totient is φ = 10352890320.

The previous prime is 20706199889. The next prime is 20706199951. The reversal of 20706199894 is 49899160702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20706199894² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 94329 + ... + 224299.

It is an arithmetic number, because the mean of its divisors is an integer number (3882491091).

Almost surely, 2^20706199894 is an apocalyptic number.

20706199894 is a deficient number, since it is larger than the sum of its proper divisors (10353728834).

20706199894 is a wasteful number, since it uses less digits than its factorization.

20706199894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209630.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 20706199894 in words is "twenty billion, seven hundred six million, one hundred ninety-nine thousand, eight hundred ninety-four".