21214204562 has 8 divisors (see below), whose sum is σ = 33693148476. Its totient is φ = 9983155072.

The previous prime is 21214204547. The next prime is 21214204591. The reversal of 21214204562 is 26540241212.

It can be written as a sum of positive squares in 2 ways, for example, as 20374422121 + 839782441 = 142739^2 + 28979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21214204562² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311973563 + ... + 311973630.

Almost surely, 2^21214204562 is an apocalyptic number.

21214204562 is a deficient number, since it is larger than the sum of its proper divisors (12478943914).

21214204562 is a wasteful number, since it uses less digits than its factorization.

21214204562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623947212.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 21214204562 its reverse (26540241212), we get a palindrome (47754445774).

The spelling of 21214204562 in words is "twenty-one billion, two hundred fourteen million, two hundred four thousand, five hundred sixty-two".