20523243707 has 4 divisors (see below), whose sum is σ = 20523533136. Its totient is φ = 20522954280.

The previous prime is 20523243683. The next prime is 20523243739. The reversal of 20523243707 is 70734232502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20523243707 - 2⁸ = 20523243451 is a prime.

It is a super-3 number, since 3×20523243707³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523243407) 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, 41657 + ... + 206837.

It is an arithmetic number, because the mean of its divisors is an integer number (5130883284).

Almost surely, 2^20523243707 is an apocalyptic number.

20523243707 is a deficient number, since it is larger than the sum of its proper divisors (289429).

20523243707 is a wasteful number, since it uses less digits than its factorization.

20523243707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289428.

The product of its (nonzero) digits is 70560, while the sum is 35.

The spelling of 20523243707 in words is "twenty billion, five hundred twenty-three million, two hundred forty-three thousand, seven hundred seven".