20545713231 has 16 divisors (see below), whose sum is σ = 27898199520. Its totient is φ = 13446069120.

The previous prime is 20545713197. The next prime is 20545713247. The reversal of 20545713231 is 13231754502.

It is not a de Polignac number, because 20545713231 - 2¹³ = 20545705039 is a prime.

It is a super-2 number, since 2×20545713231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20545713192 and 20545713201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545713131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17140 + ... + 203433.

It is an arithmetic number, because the mean of its divisors is an integer number (1743637470).

Almost surely, 2^20545713231 is an apocalyptic number.

20545713231 is a deficient number, since it is larger than the sum of its proper divisors (7352486289).

20545713231 is a wasteful number, since it uses less digits than its factorization.

20545713231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221146.

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 20545713231 in words is "twenty billion, five hundred forty-five million, seven hundred thirteen thousand, two hundred thirty-one".