21014553345 has 32 divisors (see below), whose sum is σ = 33752070144. Its totient is φ = 11164920000.

The previous prime is 21014553341. The next prime is 21014553347. The reversal of 21014553345 is 54335541012.

It is not a de Polignac number, because 21014553345 - 2² = 21014553341 is a prime.

It is a super-2 number, since 2×21014553345² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21014553341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4988290 + ... + 4992500.

It is an arithmetic number, because the mean of its divisors is an integer number (1054752192).

Almost surely, 2^21014553345 is an apocalyptic number.

It is an amenable number.

21014553345 is a deficient number, since it is larger than the sum of its proper divisors (12737516799).

21014553345 is a wasteful number, since it uses less digits than its factorization.

21014553345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 21014553345 in words is "twenty-one billion, fourteen million, five hundred fifty-three thousand, three hundred forty-five".