20949229813 has 8 divisors (see below), whose sum is σ = 21480459968. Its totient is φ = 20420001504.

The previous prime is 20949229799. The next prime is 20949229883. The reversal of 20949229813 is 31892294902.

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 20949229813 - 2²⁵ = 20915675381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20949229883) 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, 479256 + ... + 521137.

It is an arithmetic number, because the mean of its divisors is an integer number (2685057496).

Almost surely, 2^20949229813 is an apocalyptic number.

It is an amenable number.

20949229813 is a deficient number, since it is larger than the sum of its proper divisors (531230155).

20949229813 is a wasteful number, since it uses less digits than its factorization.

20949229813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000923.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 20949229813 in words is "twenty billion, nine hundred forty-nine million, two hundred twenty-nine thousand, eight hundred thirteen".