21472753620442 has 8 divisors (see below), whose sum is σ = 32209195727232. Its totient is φ = 10736355044700.

The previous prime is 21472753620401. The next prime is 21472753620449. The reversal of 21472753620442 is 24402635727412.

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

It is a super-2 number, since 2×21472753620442² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21472753620449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9620284 + ... + 11640247.

It is an arithmetic number, because the mean of its divisors is an integer number (4026149465904).

Almost surely, 2^{21472753620442} is an apocalyptic number.

21472753620442 is a deficient number, since it is larger than the sum of its proper divisors (10736442106790).

21472753620442 is a wasteful number, since it uses less digits than its factorization.

21472753620442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21765524.

The product of its (nonzero) digits is 4515840, while the sum is 49.

The spelling of 21472753620442 in words is "twenty-one trillion, four hundred seventy-two billion, seven hundred fifty-three million, six hundred twenty thousand, four hundred forty-two".