20409763 has 8 divisors (see below), whose sum is σ = 23233536. Its totient is φ = 17747400.

The previous prime is 20409757. The next prime is 20409769. The reversal of 20409763 is 36790402.

It is an interprime number because it is at equal distance from previous prime (20409757) and next prime (20409769).

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

It is not a de Polignac number, because 20409763 - 2¹³ = 20401571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20409769) 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, 40083 + ... + 40588.

It is an arithmetic number, because the mean of its divisors is an integer number (2904192).

Almost surely, 2^20409763 is an apocalyptic number.

20409763 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20409763 is a deficient number, since it is larger than the sum of its proper divisors (2823773).

20409763 is a wasteful number, since it uses less digits than its factorization.

20409763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80705.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20409763 is about 4517.7165692416. The cubic root of 20409763 is about 273.2830234922.

The spelling of 20409763 in words is "twenty million, four hundred nine thousand, seven hundred sixty-three".