20261543351 has 8 divisors (see below), whose sum is σ = 23548525440. Its totient is φ = 17072680248.

The previous prime is 20261543333. The next prime is 20261543377. The reversal of 20261543351 is 15334516202.

It is a happy number.

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 20261543351 - 2⁶ = 20261543287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261543851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24529301 + ... + 24530126.

It is an arithmetic number, because the mean of its divisors is an integer number (2943565680).

Almost surely, 2^20261543351 is an apocalyptic number.

20261543351 is a deficient number, since it is larger than the sum of its proper divisors (3286982089).

20261543351 is an equidigital number, since it uses as much as digits as its factorization.

20261543351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49059493.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20261543351 in words is "twenty billion, two hundred sixty-one million, five hundred forty-three thousand, three hundred fifty-one".