21450611105470 has 16 divisors (see below), whose sum is σ = 38611360370880. Its totient is φ = 8580186579744.

The previous prime is 21450611105467. The next prime is 21450611105513. The reversal of 21450611105470 is 7450111605412.

It is a super-2 number, since 2×21450611105470² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5659497 + ... + 8656276.

It is an arithmetic number, because the mean of its divisors is an integer number (2413210023180).

Almost surely, 2^{21450611105470} is an apocalyptic number.

21450611105470 is a deficient number, since it is larger than the sum of its proper divisors (17160749265410).

21450611105470 is a wasteful number, since it uses less digits than its factorization.

21450611105470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14465619.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 21450611105470 in words is "twenty-one trillion, four hundred fifty billion, six hundred eleven million, one hundred five thousand, four hundred seventy".