20514769 has 4 divisors (see below), whose sum is σ = 22379760. Its totient is φ = 18649780.

The previous prime is 20514757. The next prime is 20514787. The reversal of 20514769 is 96741502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20514769 is a prime.

It is a super-2 number, since 2×20514769² = 841711494246722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20512769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932479 + ... + 932500.

It is an arithmetic number, because the mean of its divisors is an integer number (5594940).

Almost surely, 2^20514769 is an apocalyptic number.

It is an amenable number.

20514769 is a deficient number, since it is larger than the sum of its proper divisors (1864991).

20514769 is a wasteful number, since it uses less digits than its factorization.

20514769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864990.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20514769 is about 4529.3232386307. The cubic root of 20514769 is about 273.7508924583.

The spelling of 20514769 in words is "twenty million, five hundred fourteen thousand, seven hundred sixty-nine".