21514211354 has 8 divisors (see below), whose sum is σ = 32272235040. Its totient is φ = 10756799676.

The previous prime is 21514211333. The next prime is 21514211359. The reversal of 21514211354 is 45311241512.

It is a happy number.

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

It is a super-2 number, since 2×21514211354² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21514211359) 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, 51704 + ... + 213779.

It is an arithmetic number, because the mean of its divisors is an integer number (4034029380).

Almost surely, 2^21514211354 is an apocalyptic number.

21514211354 is a deficient number, since it is larger than the sum of its proper divisors (10758023686).

21514211354 is a wasteful number, since it uses less digits than its factorization.

21514211354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306004.

The product of its digits is 4800, while the sum is 29.

Adding to 21514211354 its reverse (45311241512), we get a palindrome (66825452866).

The spelling of 21514211354 in words is "twenty-one billion, five hundred fourteen million, two hundred eleven thousand, three hundred fifty-four".