20772550 has 24 divisors (see below), whose sum is σ = 39044376. Its totient is φ = 8221440.

The previous prime is 20772547. The next prime is 20772553. The reversal of 20772550 is 5527702.

It is an interprime number because it is at equal distance from previous prime (20772547) and next prime (20772553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772553) 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, 2709 + ... + 6991.

It is an arithmetic number, because the mean of its divisors is an integer number (1626849).

Almost surely, 2^20772550 is an apocalyptic number.

20772550 is a deficient number, since it is larger than the sum of its proper divisors (18271826).

20772550 is a wasteful number, since it uses less digits than its factorization.

20772550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392 (or 4387 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 20772550 is about 4557.6913015254. The cubic root of 20772550 is about 274.8927405397.

The spelling of 20772550 in words is "twenty million, seven hundred seventy-two thousand, five hundred fifty".