21062154622 has 4 divisors (see below), whose sum is σ = 31593231936. Its totient is φ = 10531077310.

The previous prime is 21062154601. The next prime is 21062154623. The reversal of 21062154622 is 22645126012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21062154622² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062154623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265538654 + ... + 5265538657.

It is an arithmetic number, because the mean of its divisors is an integer number (7898307984).

Almost surely, 2^21062154622 is an apocalyptic number.

21062154622 is a deficient number, since it is larger than the sum of its proper divisors (10531077314).

21062154622 is a wasteful number, since it uses less digits than its factorization.

21062154622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10531077313.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 21062154622 in words is "twenty-one billion, sixty-two million, one hundred fifty-four thousand, six hundred twenty-two".