20312120030 has 16 divisors (see below), whose sum is σ = 38712511440. Its totient is φ = 7646915712.

The previous prime is 20312120027. The next prime is 20312120063. The reversal of 20312120030 is 3002121302.

It is a happy number.

It is a super-2 number, since 2×20312120030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20312119987 and 20312120014.

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, 59741360 + ... + 59741699.

It is an arithmetic number, because the mean of its divisors is an integer number (2419531965).

Almost surely, 2^20312120030 is an apocalyptic number.

20312120030 is a deficient number, since it is larger than the sum of its proper divisors (18400391410).

20312120030 is a wasteful number, since it uses less digits than its factorization.

20312120030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119483083.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20312120030 its reverse (3002121302), we get a palindrome (23314241332).

The spelling of 20312120030 in words is "twenty billion, three hundred twelve million, one hundred twenty thousand, thirty".