20892349427 has 4 divisors (see below), whose sum is σ = 22121311176. Its totient is φ = 19663387680.

The previous prime is 20892349369. The next prime is 20892349477. The reversal of 20892349427 is 72494329802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20892349427 - 2²⁸ = 20623913971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20892349477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614480849 + ... + 614480882.

It is an arithmetic number, because the mean of its divisors is an integer number (5530327794).

Almost surely, 2^20892349427 is an apocalyptic number.

20892349427 is a deficient number, since it is larger than the sum of its proper divisors (1228961749).

20892349427 is a wasteful number, since it uses less digits than its factorization.

20892349427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228961748.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 20892349427 in words is "twenty billion, eight hundred ninety-two million, three hundred forty-nine thousand, four hundred twenty-seven".