21550164410 has 64 divisors (see below), whose sum is σ = 42968869632. Its totient is φ = 7740158976.

The previous prime is 21550164379. The next prime is 21550164551. The reversal of 21550164410 is 1446105512.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1545329 + ... + 1559211.

It is an arithmetic number, because the mean of its divisors is an integer number (671388588).

Almost surely, 2^21550164410 is an apocalyptic number.

21550164410 is a deficient number, since it is larger than the sum of its proper divisors (21418705222).

21550164410 is a wasteful number, since it uses less digits than its factorization.

21550164410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14327.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 21550164410 its reverse (1446105512), we get a palindrome (22996269922).

The spelling of 21550164410 in words is "twenty-one billion, five hundred fifty million, one hundred sixty-four thousand, four hundred ten".