21472227412 has 6 divisors (see below), whose sum is σ = 37576397978. Its totient is φ = 10736113704.

The previous prime is 21472227409. The next prime is 21472227437.

21472227412 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 18145706436 + 3326520976 = 134706^2 + 57676^2 .

It is a super-2 number, since 2×21472227412² (a number of 21 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 as a sum of consecutive naturals, namely, 2684028423 + ... + 2684028430.

Almost surely, 2^21472227412 is an apocalyptic number.

It is an amenable number.

21472227412 is a deficient number, since it is larger than the sum of its proper divisors (16104170566).

21472227412 is a wasteful number, since it uses less digits than its factorization.

21472227412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368056857 (or 5368056855 counting only the distinct ones).

The product of its digits is 25088, while the sum is 34.

The spelling of 21472227412 in words is "twenty-one billion, four hundred seventy-two million, two hundred twenty-seven thousand, four hundred twelve".