20523231784 has 16 divisors (see below), whose sum is σ = 41979337920. Its totient is φ = 9328741680.

The previous prime is 20523231761. The next prime is 20523231787. The reversal of 20523231784 is 48713232502.

It is a super-3 number, since 3×20523231784³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20523231787) 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, 116609184 + ... + 116609359.

It is an arithmetic number, because the mean of its divisors is an integer number (2623708620).

Almost surely, 2^20523231784 is an apocalyptic number.

It is an amenable number.

20523231784 is an abundant number, since it is smaller than the sum of its proper divisors (21456106136).

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

20523231784 is a wasteful number, since it uses less digits than its factorization.

20523231784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233218560 (or 233218556 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

It can be divided in two parts, 205232 and 31784, that added together give a triangular number (237016 = T₆₈₈).

The spelling of 20523231784 in words is "twenty billion, five hundred twenty-three million, two hundred thirty-one thousand, seven hundred eighty-four".