20773507243 has 8 divisors (see below), whose sum is σ = 20883139200. Its totient is φ = 20664022848.

The previous prime is 20773507231. The next prime is 20773507301. The reversal of 20773507243 is 34270537702.

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

It is a cyclic number.

It is not a de Polignac number, because 20773507243 - 2⁹ = 20773506731 is a prime.

It is a super-2 number, since 2×20773507243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20773507196 and 20773507205.

It is not an unprimeable number, because it can be changed into a prime (20773507543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251313 + ... + 323581.

It is an arithmetic number, because the mean of its divisors is an integer number (2610392400).

Almost surely, 2^20773507243 is an apocalyptic number.

20773507243 is a deficient number, since it is larger than the sum of its proper divisors (109631957).

20773507243 is a wasteful number, since it uses less digits than its factorization.

20773507243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73781.

The product of its (nonzero) digits is 246960, while the sum is 40.

The spelling of 20773507243 in words is "twenty billion, seven hundred seventy-three million, five hundred seven thousand, two hundred forty-three".