20899562043 has 8 divisors (see below), whose sum is σ = 27873330448. Its totient is φ = 13929417504.

The previous prime is 20899562039. The next prime is 20899562077. The reversal of 20899562043 is 34026599802.

It is a happy number.

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

It is not a de Polignac number, because 20899562043 - 2² = 20899562039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20899561983 and 20899562001.

It is not an unprimeable number, because it can be changed into a prime (20899562543) 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, 892480 + ... + 915597.

It is an arithmetic number, because the mean of its divisors is an integer number (3484166306).

Almost surely, 2^20899562043 is an apocalyptic number.

20899562043 is a deficient number, since it is larger than the sum of its proper divisors (6973768405).

20899562043 is a wasteful number, since it uses less digits than its factorization.

20899562043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811933.

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 20899562043 in words is "twenty billion, eight hundred ninety-nine million, five hundred sixty-two thousand, forty-three".