21355346054636 has 24 divisors (see below), whose sum is σ = 40770256700880. Its totient is φ = 9706746982400.

The previous prime is 21355346054591. The next prime is 21355346054641. The reversal of 21355346054636 is 63645064355312.

It is a super-2 number, since 2×21355346054636² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3814901 + ... + 7567308.

It is an arithmetic number, because the mean of its divisors is an integer number (1698760695870).

Almost surely, 2^{21355346054636} is an apocalyptic number.

It is an amenable number.

21355346054636 is a deficient number, since it is larger than the sum of its proper divisors (19414910646244).

21355346054636 is a wasteful number, since it uses less digits than its factorization.

21355346054636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11424865 (or 11424863 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 53.

The spelling of 21355346054636 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred forty-six million, fifty-four thousand, six hundred thirty-six".