23145640534 has 16 divisors (see below), whose sum is σ = 35260196400. Its totient is φ = 11393594784.

The previous prime is 23145640477. The next prime is 23145640559. The reversal of 23145640534 is 43504654132.

It is a junction number, because it is equal to n+sod(n) for n = 23145640493 and 23145640502.

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, 303904 + ... + 372355.

It is an arithmetic number, because the mean of its divisors is an integer number (2203762275).

Almost surely, 2^23145640534 is an apocalyptic number.

23145640534 is a deficient number, since it is larger than the sum of its proper divisors (12114555866).

23145640534 is a wasteful number, since it uses less digits than its factorization.

23145640534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676527.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 23145640534 in words is "twenty-three billion, one hundred forty-five million, six hundred forty thousand, five hundred thirty-four".