20123213242 has 16 divisors (see below), whose sum is σ = 34865888832. Its totient is φ = 8608861120.

The previous prime is 20123213237. The next prime is 20123213287. The reversal of 20123213242 is 24231232102.

It is a super-2 number, since 2×20123213242² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 26902318 + ... + 26903065.

It is an arithmetic number, because the mean of its divisors is an integer number (2179118052).

Almost surely, 2^20123213242 is an apocalyptic number.

20123213242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20123213242 is a deficient number, since it is larger than the sum of its proper divisors (14742675590).

20123213242 is a wasteful number, since it uses less digits than its factorization.

20123213242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53805413.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20123213242 its reverse (24231232102), we get a palindrome (44354445344).

The spelling of 20123213242 in words is "twenty billion, one hundred twenty-three million, two hundred thirteen thousand, two hundred forty-two".