20263423140 has 36 divisors (see below), whose sum is σ = 61465717404. Its totient is φ = 5403579456.

The previous prime is 20263423097. The next prime is 20263423163. The reversal of 20263423140 is 4132436202.

20263423140 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 342 + 314 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11788747776 + 8474675364 = 108576^2 + 92058^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56287107 + ... + 56287466.

It is an arithmetic number, because the mean of its divisors is an integer number (1707381039).

Almost surely, 2^20263423140 is an apocalyptic number.

20263423140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20263423140 is an abundant number, since it is smaller than the sum of its proper divisors (41202294264).

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

20263423140 is a wasteful number, since it uses less digits than its factorization.

20263423140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112574588 (or 112574583 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20263423140 its reverse (4132436202), we get a palindrome (24395859342).

The spelling of 20263423140 in words is "twenty billion, two hundred sixty-three million, four hundred twenty-three thousand, one hundred forty".