21486126 has 8 divisors (see below), whose sum is σ = 42972264. Its totient is φ = 7162040.

The previous prime is 21486119. The next prime is 21486133. The reversal of 21486126 is 62168412.

It is an interprime number because it is at equal distance from previous prime (21486119) and next prime (21486133).

It is a sphenic number, since it is the product of 3 distinct primes.

21486126 is an admirable number.

It is a super-2 number, since 2×21486126² = 923307220975752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21486093 and 21486102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1790505 + ... + 1790516.

It is an arithmetic number, because the mean of its divisors is an integer number (5371533).

Almost surely, 2^21486126 is an apocalyptic number.

21486126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21486126 is a wasteful number, since it uses less digits than its factorization.

21486126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581026.

The product of its digits is 4608, while the sum is 30.

The square root of 21486126 is about 4635.3129344199. The cubic root of 21486126 is about 278.0050634828.

It can be divided in two parts, 21486 and 126, that added together give a palindrome (21612).

The spelling of 21486126 in words is "twenty-one million, four hundred eighty-six thousand, one hundred twenty-six".