20772549 has 12 divisors (see below), whose sum is σ = 34291296. Its totient is φ = 11869992.

The previous prime is 20772547. The next prime is 20772553. The reversal of 20772549 is 94527702.

It is not a de Polignac number, because 20772549 - 2¹ = 20772547 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164799 + ... + 164924.

It is an arithmetic number, because the mean of its divisors is an integer number (2857608).

Almost surely, 2^20772549 is an apocalyptic number.

It is an amenable number.

20772549 is a deficient number, since it is larger than the sum of its proper divisors (13518747).

20772549 is a wasteful number, since it uses less digits than its factorization.

20772549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329736 (or 329733 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 20772549 is about 4557.6911918207. The cubic root of 20772549 is about 274.8927361286.

It can be divided in two parts, 20772 and 549, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 20772549 in words is "twenty million, seven hundred seventy-two thousand, five hundred forty-nine".