20823185830 has 16 divisors (see below), whose sum is σ = 37485203184. Its totient is φ = 8328503520.

The previous prime is 20823185819. The next prime is 20823185899. The reversal of 20823185830 is 3858132802.

It is a super-2 number, since 2×20823185830² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24304 + ... + 205516.

It is an arithmetic number, because the mean of its divisors is an integer number (2342825199).

Almost surely, 2^20823185830 is an apocalyptic number.

20823185830 is a deficient number, since it is larger than the sum of its proper divisors (16662017354).

20823185830 is a wasteful number, since it uses less digits than its factorization.

20823185830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192711.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 20823185830 in words is "twenty billion, eight hundred twenty-three million, one hundred eighty-five thousand, eight hundred thirty".