20772003 has 16 divisors (see below), whose sum is σ = 31781376. Its totient is φ = 11821440.

The previous prime is 20771987. The next prime is 20772019. The reversal of 20772003 is 30027702.

It is an interprime number because it is at equal distance from previous prime (20771987) and next prime (20772019).

It is not a de Polignac number, because 20772003 - 2⁴ = 20771987 is a prime.

It is a super-2 number, since 2×20772003² = 862952217264018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20772043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3643 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (1986336).

Almost surely, 2^20772003 is an apocalyptic number.

20772003 is a deficient number, since it is larger than the sum of its proper divisors (11009373).

20772003 is a wasteful number, since it uses less digits than its factorization.

20772003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 20772003 is about 4557.6312926782. The cubic root of 20772003 is about 274.8903276174.

Adding to 20772003 its reverse (30027702), we get a palindrome (50799705).

The spelling of 20772003 in words is "twenty million, seven hundred seventy-two thousand, three".