20251479 has 8 divisors (see below), whose sum is σ = 27028080. Its totient is φ = 13487936.

The previous prime is 20251457. The next prime is 20251493. The reversal of 20251479 is 97415202.

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 20251479 - 2⁵ = 20251447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20251079) 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, 1249 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (3378510).

Almost surely, 2^20251479 is an apocalyptic number.

20251479 is a deficient number, since it is larger than the sum of its proper divisors (6776601).

20251479 is a wasteful number, since it uses less digits than its factorization.

20251479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 20251479 is about 4500.1643303328. The cubic root of 20251479 is about 272.5747246185.

It can be divided in two parts, 202 and 51479, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 20251479 in words is "twenty million, two hundred fifty-one thousand, four hundred seventy-nine".