20551379 has 8 divisors (see below), whose sum is σ = 21071568. Its totient is φ = 20037600.

The previous prime is 20551367. The next prime is 20551387. The reversal of 20551379 is 97315502.

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

It is a cyclic number.

It is not a de Polignac number, because 20551379 - 2²⁴ = 3774163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20551579) 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, 5249 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (2633946).

Almost surely, 2^20551379 is an apocalyptic number.

20551379 is a deficient number, since it is larger than the sum of its proper divisors (520189).

20551379 is a wasteful number, since it uses less digits than its factorization.

20551379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 20551379 is about 4533.3628798057. The cubic root of 20551379 is about 273.9136380461.

The spelling of 20551379 in words is "twenty million, five hundred fifty-one thousand, three hundred seventy-nine".