20123210352 has 80 divisors (see below), whose sum is σ = 62906188032. Its totient is φ = 5411281920.

The previous prime is 20123210351. The next prime is 20123210353. The reversal of 20123210352 is 25301232102.

It is an interprime number because it is at equal distance from previous prime (20123210351) and next prime (20123210353).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123210351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1755774 + ... + 1767197.

Almost surely, 2^20123210352 is an apocalyptic number.

It is an amenable number.

20123210352 is an abundant number, since it is smaller than the sum of its proper divisors (42782977680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123210352 is a wasteful number, since it uses less digits than its factorization.

20123210352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523006 (or 3523000 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20123210352 its reverse (25301232102), we get a palindrome (45424442454).

The spelling of 20123210352 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, three hundred fifty-two".