21477016434 has 16 divisors (see below), whose sum is σ = 45214771680. Its totient is φ = 6782215680.

The previous prime is 21477016423. The next prime is 21477016439. The reversal of 21477016434 is 43461077412.

It is a super-2 number, since 2×21477016434² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21477016392 and 21477016401.

It is not an unprimeable number, because it can be changed into a prime (21477016439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94197327 + ... + 94197554.

It is an arithmetic number, because the mean of its divisors is an integer number (2825923230).

Almost surely, 2^21477016434 is an apocalyptic number.

21477016434 is an abundant number, since it is smaller than the sum of its proper divisors (23737755246).

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

21477016434 is a wasteful number, since it uses less digits than its factorization.

21477016434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188394905.

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21477016434 in words is "twenty-one billion, four hundred seventy-seven million, sixteen thousand, four hundred thirty-four".