21014611454 has 4 divisors (see below), whose sum is σ = 31521917184. Its totient is φ = 10507305726.

The previous prime is 21014611451. The next prime is 21014611507. The reversal of 21014611454 is 45411641012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21014611454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014611451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253652862 + ... + 5253652865.

It is an arithmetic number, because the mean of its divisors is an integer number (7880479296).

Almost surely, 2^21014611454 is an apocalyptic number.

21014611454 is a deficient number, since it is larger than the sum of its proper divisors (10507305730).

21014611454 is a wasteful number, since it uses less digits than its factorization.

21014611454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10507305729.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 21014611454 in words is "twenty-one billion, fourteen million, six hundred eleven thousand, four hundred fifty-four".