21244117754 has 8 divisors (see below), whose sum is σ = 31867308480. Its totient is φ = 10621681596.

The previous prime is 21244117753. The next prime is 21244117771. The reversal of 21244117754 is 45771144212.

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

It is a super-3 number, since 3×21244117754³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21244117753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112034 + ... + 234605.

It is an arithmetic number, because the mean of its divisors is an integer number (3983413560).

Almost surely, 2^21244117754 is an apocalyptic number.

21244117754 is a deficient number, since it is larger than the sum of its proper divisors (10623190726).

21244117754 is a wasteful number, since it uses less digits than its factorization.

21244117754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377284.

The product of its digits is 62720, while the sum is 38.

The spelling of 21244117754 in words is "twenty-one billion, two hundred forty-four million, one hundred seventeen thousand, seven hundred fifty-four".