21354662146444 has 48 divisors (see below), whose sum is σ = 40965601412736. Its totient is φ = 9659624486400.

The previous prime is 21354662146403. The next prime is 21354662146463. The reversal of 21354662146444 is 44464126645312.

It is a junction number, because it is equal to n+sod(n) for n = 21354662146391 and 21354662146400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89908347 + ... + 90145549.

It is an arithmetic number, because the mean of its divisors is an integer number (853450029432).

Almost surely, 2^{21354662146444} is an apocalyptic number.

It is an amenable number.

21354662146444 is a deficient number, since it is larger than the sum of its proper divisors (19610939266292).

21354662146444 is a wasteful number, since it uses less digits than its factorization.

21354662146444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247126 (or 247124 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 52.

The spelling of 21354662146444 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred sixty-two million, one hundred forty-six thousand, four hundred forty-four".