20667948 has 48 divisors (see below), whose sum is σ = 56899584. Its totient is φ = 5713920.

The previous prime is 20667943. The next prime is 20667967. The reversal of 20667948 is 84976602.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20667943) 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, 1365 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (1185408).

Almost surely, 2^20667948 is an apocalyptic number.

20667948 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20667948 is an abundant number, since it is smaller than the sum of its proper divisors (36231636).

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

20667948 is a wasteful number, since it uses less digits than its factorization.

20667948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7982 (or 7980 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 20667948 is about 4546.2014913552. The cubic root of 20667948 is about 274.4305483532.

The spelling of 20667948 in words is "twenty million, six hundred sixty-seven thousand, nine hundred forty-eight".