21335990100643 has 8 divisors (see below), whose sum is σ = 21344106564080. Its totient is φ = 21327874192800.

The previous prime is 21335990100629. The next prime is 21335990100697. The reversal of 21335990100643 is 34600109953312.

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

It is not a de Polignac number, because 21335990100643 - 2¹³ = 21335990092451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21335990100593 and 21335990100602.

It is not an unprimeable number, because it can be changed into a prime (21335990100143) 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, 86952853 + ... + 87197881.

It is an arithmetic number, because the mean of its divisors is an integer number (2668013320510).

Almost surely, 2^{21335990100643} is an apocalyptic number.

21335990100643 is a deficient number, since it is larger than the sum of its proper divisors (8116463437).

21335990100643 is a wasteful number, since it uses less digits than its factorization.

21335990100643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277797.

The product of its (nonzero) digits is 524880, while the sum is 46.

The spelling of 21335990100643 in words is "twenty-one trillion, three hundred thirty-five billion, nine hundred ninety million, one hundred thousand, six hundred forty-three".