20830551 has 8 divisors (see below), whose sum is σ = 31741824. Its totient is φ = 11903160.

The previous prime is 20830549. The next prime is 20830573. The reversal of 20830551 is 15503802.

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

It is not a de Polignac number, because 20830551 - 2¹ = 20830549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495945 + ... + 495986.

It is an arithmetic number, because the mean of its divisors is an integer number (3967728).

Almost surely, 2^20830551 is an apocalyptic number.

20830551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20830551 is a deficient number, since it is larger than the sum of its proper divisors (10911273).

20830551 is an equidigital number, since it uses as much as digits as its factorization.

20830551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991941.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 20830551 is about 4564.0498463536. The cubic root of 20830551 is about 275.1483541129.

The spelling of 20830551 in words is "twenty million, eight hundred thirty thousand, five hundred fifty-one".