20767420 has 24 divisors (see below), whose sum is σ = 44541504. Its totient is φ = 8129856.

The previous prime is 20767339. The next prime is 20767423. The reversal of 20767420 is 2476702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20767423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10107 + ... + 11986.

It is an arithmetic number, because the mean of its divisors is an integer number (1855896).

Almost surely, 2^20767420 is an apocalyptic number.

20767420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20767420 is an abundant number, since it is smaller than the sum of its proper divisors (23774084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20767420 is a wasteful number, since it uses less digits than its factorization.

20767420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22149 (or 22147 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20767420 is about 4557.1284818403. The cubic root of 20767420 is about 274.8701094575.

The spelling of 20767420 in words is "twenty million, seven hundred sixty-seven thousand, four hundred twenty".