21241441877 has 16 divisors (see below), whose sum is σ = 23436390960. Its totient is φ = 19161612288.

The previous prime is 21241441853. The next prime is 21241441891. The reversal of 21241441877 is 77814414212.

It can be written as a sum of positive squares in 8 ways, for example, as 44702596 + 21196739281 = 6686^2 + 145591^2 .

It is not a de Polignac number, because 21241441877 - 2⁸ = 21241441621 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 (21241441847) 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, 89708 + ... + 224789.

It is an arithmetic number, because the mean of its divisors is an integer number (1464774435).

Almost surely, 2^21241441877 is an apocalyptic number.

It is an amenable number.

21241441877 is a deficient number, since it is larger than the sum of its proper divisors (2194949083).

21241441877 is a wasteful number, since it uses less digits than its factorization.

21241441877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314680.

The product of its digits is 100352, while the sum is 41.

The spelling of 21241441877 in words is "twenty-one billion, two hundred forty-one million, four hundred forty-one thousand, eight hundred seventy-seven".