20551548 has 12 divisors (see below), whose sum is σ = 47953640. Its totient is φ = 6850512.

The previous prime is 20551523. The next prime is 20551561. The reversal of 20551548 is 84515502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20551548² = 844732250392608, which contains 22 as substring.

It is a congruent number.

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, 856303 + ... + 856326.

Almost surely, 2^20551548 is an apocalyptic number.

It is an amenable number.

20551548 is an abundant number, since it is smaller than the sum of its proper divisors (27402092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20551548 is a wasteful number, since it uses less digits than its factorization.

20551548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712636 (or 1712634 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 20551548 is about 4533.3815193518. The cubic root of 20551548 is about 273.9143888680.

The spelling of 20551548 in words is "twenty million, five hundred fifty-one thousand, five hundred forty-eight".