21663010143446 has 16 divisors (see below), whose sum is σ = 38417160846240. Its totient is φ = 8964004197120.

The previous prime is 21663010143431. The next prime is 21663010143469. The reversal of 21663010143446 is 64434101036612.

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, 26678583515 + ... + 26678584326.

It is an arithmetic number, because the mean of its divisors is an integer number (2401072552890).

Almost surely, 2^{21663010143446} is an apocalyptic number.

21663010143446 is a deficient number, since it is larger than the sum of its proper divisors (16754150702794).

21663010143446 is a wasteful number, since it uses less digits than its factorization.

21663010143446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53357167879.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 21663010143446 in words is "twenty-one trillion, six hundred sixty-three billion, ten million, one hundred forty-three thousand, four hundred forty-six".