20461143567 has 16 divisors (see below), whose sum is σ = 28723029120. Its totient is φ = 12920292000.

The previous prime is 20461143557. The next prime is 20461143617. The reversal of 20461143567 is 76534116402.

It is a happy number.

It is not a de Polignac number, because 20461143567 - 2²² = 20456949263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461143557) 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, 282817 + ... + 347717.

It is an arithmetic number, because the mean of its divisors is an integer number (1795189320).

Almost surely, 2^20461143567 is an apocalyptic number.

20461143567 is a deficient number, since it is larger than the sum of its proper divisors (8261885553).

20461143567 is a wasteful number, since it uses less digits than its factorization.

20461143567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70454.

The product of its (nonzero) digits is 120960, while the sum is 39.

Adding to 20461143567 its reverse (76534116402), we get a palindrome (96995259969).

The spelling of 20461143567 in words is "twenty billion, four hundred sixty-one million, one hundred forty-three thousand, five hundred sixty-seven".