21486416436 has 36 divisors (see below), whose sum is σ = 54540158400. Its totient is φ = 7132168848.

The previous prime is 21486416431. The next prime is 21486416443. The reversal of 21486416436 is 63461468412.

21486416436 is a `hidden beast` number, since 2 + 1 + 486 + 4 + 164 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21486416436² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21486416391 and 21486416400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21486416431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1240026 + ... + 1257233.

It is an arithmetic number, because the mean of its divisors is an integer number (1515004400).

Almost surely, 2^21486416436 is an apocalyptic number.

It is an amenable number.

21486416436 is an abundant number, since it is smaller than the sum of its proper divisors (33053741964).

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

21486416436 is a wasteful number, since it uses less digits than its factorization.

21486416436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497508 (or 2497503 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The spelling of 21486416436 in words is "twenty-one billion, four hundred eighty-six million, four hundred sixteen thousand, four hundred thirty-six".