20461156311 has 4 divisors (see below), whose sum is σ = 27281541752. Its totient is φ = 13640770872.

The previous prime is 20461156291. The next prime is 20461156321. The reversal of 20461156311 is 11365116402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20461156311 - 2⁵ = 20461156279 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 (20461156321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3410192716 + ... + 3410192721.

It is an arithmetic number, because the mean of its divisors is an integer number (6820385438).

Almost surely, 2^20461156311 is an apocalyptic number.

20461156311 is a deficient number, since it is larger than the sum of its proper divisors (6820385441).

20461156311 is an equidigital number, since it uses as much as digits as its factorization.

20461156311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820385440.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 20461156311 in words is "twenty billion, four hundred sixty-one million, one hundred fifty-six thousand, three hundred eleven".