20551612 has 6 divisors (see below), whose sum is σ = 35965328. Its totient is φ = 10275804.

The previous prime is 20551607. The next prime is 20551621. The reversal of 20551612 is 21615502.

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, 2568948 + ... + 2568955.

Almost surely, 2^20551612 is an apocalyptic number.

It is an amenable number.

20551612 is a deficient number, since it is larger than the sum of its proper divisors (15413716).

20551612 is a wasteful number, since it uses less digits than its factorization.

20551612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137907 (or 5137905 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 20551612 is about 4533.3885780948. The cubic root of 20551612 is about 273.9146732019.

The spelling of 20551612 in words is "twenty million, five hundred fifty-one thousand, six hundred twelve".