21146541623236 has 6 divisors (see below), whose sum is σ = 37006447840670. Its totient is φ = 10573270811616.

The previous prime is 21146541623219. The next prime is 21146541623243. The reversal of 21146541623236 is 63232614564112.

It can be written as a sum of positive squares in only one way, i.e., 19150198696836 + 1996342926400 = 4376094^2 + 1412920^2 .

It is a super-2 number, since 2×21146541623236² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2643317702901 + ... + 2643317702908.

Almost surely, 2^{21146541623236} is an apocalyptic number.

It is an amenable number.

21146541623236 is a deficient number, since it is larger than the sum of its proper divisors (15859906217434).

21146541623236 is a wasteful number, since it uses less digits than its factorization.

21146541623236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286635405813 (or 5286635405811 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

The spelling of 21146541623236 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-one million, six hundred twenty-three thousand, two hundred thirty-six".