21115653356414 has 16 divisors (see below), whose sum is σ = 31966852848000. Its totient is φ = 10460347674264.

The previous prime is 21115653356387. The next prime is 21115653356419. The reversal of 21115653356414 is 41465335651112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115653356419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77847764 + ... + 78118535.

It is an arithmetic number, because the mean of its divisors is an integer number (1997928303000).

Almost surely, 2^{21115653356414} is an apocalyptic number.

21115653356414 is a deficient number, since it is larger than the sum of its proper divisors (10851199491586).

21115653356414 is a wasteful number, since it uses less digits than its factorization.

21115653356414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155966927.

The product of its digits is 1296000, while the sum is 47.

The spelling of 21115653356414 in words is "twenty-one trillion, one hundred fifteen billion, six hundred fifty-three million, three hundred fifty-six thousand, four hundred fourteen".