21869730554 has 16 divisors (see below), whose sum is σ = 38019010176. Its totient is φ = 9240730800.

The previous prime is 21869730551. The next prime is 21869730577. The reversal of 21869730554 is 45503796812.

It is a happy number.

It is a super-2 number, since 2×21869730554² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21869730551) 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, 10999877 + ... + 11001864.

It is an arithmetic number, because the mean of its divisors is an integer number (2376188136).

It is a 1-persistent number, because it is pandigital, but 2⋅21869730554 = 43739461108 is not.

Almost surely, 2^21869730554 is an apocalyptic number.

21869730554 is a deficient number, since it is larger than the sum of its proper divisors (16149279622).

21869730554 is a wasteful number, since it uses less digits than its factorization.

21869730554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22001821.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 21869730554 in words is "twenty-one billion, eight hundred sixty-nine million, seven hundred thirty thousand, five hundred fifty-four".