23212305040 has 20 divisors (see below), whose sum is σ = 53968609404. Its totient is φ = 9284921984.

The previous prime is 23212305031. The next prime is 23212305049. The reversal of 23212305040 is 4050321232.

It is an interprime number because it is at equal distance from previous prime (23212305031) and next prime (23212305049).

It can be written as a sum of positive squares in 2 ways, for example, as 12339655056 + 10872649984 = 111084^2 + 104272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×23212305040² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23212305049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145076827 + ... + 145076986.

Almost surely, 2^23212305040 is an apocalyptic number.

23212305040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23212305040 is an abundant number, since it is smaller than the sum of its proper divisors (30756304364).

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

23212305040 is a wasteful number, since it uses less digits than its factorization.

23212305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290153826 (or 290153820 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 23212305040 its reverse (4050321232), we get a palindrome (27262626272).

It can be divided in two parts, 2321 and 2305040, that added together give a square (2307361 = 1519²).

The spelling of 23212305040 in words is "twenty-three billion, two hundred twelve million, three hundred five thousand, forty".