20212531705 has 8 divisors (see below), whose sum is σ = 24264217152. Its totient is φ = 16163905968.

The previous prime is 20212531699. The next prime is 20212531709. The reversal of 20212531705 is 50713521202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20212531705 - 2¹⁷ = 20212400633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212531709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750367 + ... + 776836.

It is an arithmetic number, because the mean of its divisors is an integer number (3033027144).

Almost surely, 2^20212531705 is an apocalyptic number.

It is an amenable number.

20212531705 is a deficient number, since it is larger than the sum of its proper divisors (4051685447).

20212531705 is a wasteful number, since it uses less digits than its factorization.

20212531705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529855.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 20212531705 in words is "twenty billion, two hundred twelve million, five hundred thirty-one thousand, seven hundred five".