20273691 has 16 divisors (see below), whose sum is σ = 27624960. Its totient is φ = 13222560.

The previous prime is 20273681. The next prime is 20273699. The reversal of 20273691 is 19637202.

It is not a de Polignac number, because 20273691 - 2⁹ = 20273179 is a prime.

It is a super-2 number, since 2×20273691² = 822045093526962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20273699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30721 + ... + 31373.

It is an arithmetic number, because the mean of its divisors is an integer number (1726560).

Almost surely, 2^20273691 is an apocalyptic number.

20273691 is a deficient number, since it is larger than the sum of its proper divisors (7351269).

20273691 is a wasteful number, since it uses less digits than its factorization.

20273691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20273691 is about 4502.6315638746. The cubic root of 20273691 is about 272.6743423240.

The spelling of 20273691 in words is "twenty million, two hundred seventy-three thousand, six hundred ninety-one".