20692516906 has 8 divisors (see below), whose sum is σ = 31167567684. Its totient is φ = 10303327680.

The previous prime is 20692516861. The next prime is 20692516951. The reversal of 20692516906 is 60961529602.

It is an interprime number because it is at equal distance from previous prime (20692516861) and next prime (20692516951).

It can be written as a sum of positive squares in 2 ways, for example, as 19075753225 + 1616763681 = 138115^2 + 40209^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21464785 + ... + 21465748.

Almost surely, 2^20692516906 is an apocalyptic number.

20692516906 is a deficient number, since it is larger than the sum of its proper divisors (10475050778).

20692516906 is a wasteful number, since it uses less digits than its factorization.

20692516906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42930776.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 20692516906 in words is "twenty billion, six hundred ninety-two million, five hundred sixteen thousand, nine hundred six".