20815361794 has 8 divisors (see below), whose sum is σ = 31223654928. Its totient is φ = 10407476820.

The previous prime is 20815361789. The next prime is 20815361797. The reversal of 20815361794 is 49716351802.

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

It is a super-2 number, since 2×20815361794² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20815361797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147889 + ... + 251995.

It is an arithmetic number, because the mean of its divisors is an integer number (3902956866).

It is a 1-persistent number, because it is pandigital, but 2⋅20815361794 = 41630723588 is not.

Almost surely, 2^20815361794 is an apocalyptic number.

20815361794 is a deficient number, since it is larger than the sum of its proper divisors (10408293134).

20815361794 is a wasteful number, since it uses less digits than its factorization.

20815361794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204080.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 20815361794 in words is "twenty billion, eight hundred fifteen million, three hundred sixty-one thousand, seven hundred ninety-four".