20820700030 has 16 divisors (see below), whose sum is σ = 40360126464. Its totient is φ = 7687643040.

The previous prime is 20820700007. The next prime is 20820700031. The reversal of 20820700030 is 3000702802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20820699974 and 20820700010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20820700031) 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, 80079486 + ... + 80079745.

It is an arithmetic number, because the mean of its divisors is an integer number (2522507904).

Almost surely, 2^20820700030 is an apocalyptic number.

20820700030 is a deficient number, since it is larger than the sum of its proper divisors (19539426434).

20820700030 is a wasteful number, since it uses less digits than its factorization.

20820700030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160159251.

The product of its (nonzero) digits is 672, while the sum is 22.

The spelling of 20820700030 in words is "twenty billion, eight hundred twenty million, seven hundred thousand, thirty".