20928213263 has 8 divisors (see below), whose sum is σ = 21062406288. Its totient is φ = 20794172544.

The previous prime is 20928213253. The next prime is 20928213277. The reversal of 20928213263 is 36231282902.

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 20928213263 - 2⁴ = 20928213247 is a prime.

It is a super-2 number, since 2×20928213263² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20928213203) 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, 244295 + ... + 318647.

It is an arithmetic number, because the mean of its divisors is an integer number (2632800786).

Almost surely, 2^20928213263 is an apocalyptic number.

20928213263 is a deficient number, since it is larger than the sum of its proper divisors (134193025).

20928213263 is a wasteful number, since it uses less digits than its factorization.

20928213263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76153.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 20928213263 in words is "twenty billion, nine hundred twenty-eight million, two hundred thirteen thousand, two hundred sixty-three".