21450008877 has 8 divisors (see below), whose sum is σ = 31200012960. Its totient is φ = 13000005360.

The previous prime is 21450008873. The next prime is 21450008917. The reversal of 21450008877 is 77880005412.

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

It is not a de Polignac number, because 21450008877 - 2² = 21450008873 is a prime.

It is a super-2 number, since 2×21450008877² (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 (21450008873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325000102 + ... + 325000167.

It is an arithmetic number, because the mean of its divisors is an integer number (3900001620).

Almost surely, 2^21450008877 is an apocalyptic number.

It is an amenable number.

21450008877 is a deficient number, since it is larger than the sum of its proper divisors (9750004083).

21450008877 is a wasteful number, since it uses less digits than its factorization.

21450008877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650000283.

The product of its (nonzero) digits is 125440, while the sum is 42.

The spelling of 21450008877 in words is "twenty-one billion, four hundred fifty million, eight thousand, eight hundred seventy-seven".