21477434331426 has 16 divisors (see below), whose sum is σ = 42954941281728. Its totient is φ = 7159132674000.

The previous prime is 21477434331403. The next prime is 21477434331427. The reversal of 21477434331426 is 62413343477412.

It is a super-2 number, since 2×21477434331426² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21477434331427) 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, 1293276 + ... + 6680376.

It is an arithmetic number, because the mean of its divisors is an integer number (2684683830108).

Almost surely, 2^{21477434331426} is an apocalyptic number.

21477434331426 is an abundant number, since it is smaller than the sum of its proper divisors (21477506950302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21477434331426 is a wasteful number, since it uses less digits than its factorization.

21477434331426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051577.

The product of its digits is 8128512, while the sum is 51.

The spelling of 21477434331426 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty-four million, three hundred thirty-one thousand, four hundred twenty-six".