21223511505354 has 32 divisors (see below), whose sum is σ = 45234940354560. Its totient is φ = 6622939758512.

The previous prime is 21223511505353. The next prime is 21223511505409. The reversal of 21223511505354 is 45350511532212.

It is a super-2 number, since 2×21223511505354² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21223511505353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1636095234 + ... + 1636108205.

It is an arithmetic number, because the mean of its divisors is an integer number (1413591886080).

Almost surely, 2^{21223511505354} is an apocalyptic number.

21223511505354 is an abundant number, since it is smaller than the sum of its proper divisors (24011428849206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21223511505354 is a wasteful number, since it uses less digits than its factorization.

21223511505354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272203514.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 21223511505354 in words is "twenty-one trillion, two hundred twenty-three billion, five hundred eleven million, five hundred five thousand, three hundred fifty-four".