20531544201 has 16 divisors (see below), whose sum is σ = 34762403200. Its totient is φ = 11732310864.

The previous prime is 20531544179. The next prime is 20531544217. The reversal of 20531544201 is 10244513502.

20531544201 is a `hidden beast` number, since 205 + 3 + 15 + 442 + 0 + 1 = 666.

It is not a de Polignac number, because 20531544201 - 2¹¹ = 20531542153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20531544601) 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, 54316066 + ... + 54316443.

It is an arithmetic number, because the mean of its divisors is an integer number (2172650200).

Almost surely, 2^20531544201 is an apocalyptic number.

20531544201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20531544201 is a deficient number, since it is larger than the sum of its proper divisors (14230858999).

20531544201 is a wasteful number, since it uses less digits than its factorization.

20531544201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108632525 (or 108632519 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20531544201 in words is "twenty billion, five hundred thirty-one million, five hundred forty-four thousand, two hundred one".