21011344498 has 16 divisors (see below), whose sum is σ = 31659284160. Its totient is φ = 10458351376.

The previous prime is 21011344483. The next prime is 21011344499. The reversal of 21011344498 is 89444311012.

It is a super-2 number, since 2×21011344498² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011344499) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 396540 + ... + 446392.

It is an arithmetic number, because the mean of its divisors is an integer number (1978705260).

Almost surely, 2^21011344498 is an apocalyptic number.

21011344498 is a deficient number, since it is larger than the sum of its proper divisors (10647939662).

21011344498 is a wasteful number, since it uses less digits than its factorization.

21011344498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50801.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 21011344498 in words is "twenty-one billion, eleven million, three hundred forty-four thousand, four hundred ninety-eight".