20671948 has 24 divisors (see below), whose sum is σ = 40138560. Its totient is φ = 9235920.

The previous prime is 20671939. The next prime is 20671957. The reversal of 20671948 is 84917602.

It is an interprime number because it is at equal distance from previous prime (20671939) and next prime (20671957).

It is a super-2 number, since 2×20671948² = 854658868229408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386 + ... + 6577.

It is an arithmetic number, because the mean of its divisors is an integer number (1672440).

Almost surely, 2^20671948 is an apocalyptic number.

It is an amenable number.

20671948 is a deficient number, since it is larger than the sum of its proper divisors (19466612).

20671948 is a wasteful number, since it uses less digits than its factorization.

20671948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8037 (or 8035 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20671948 is about 4546.6413977792. The cubic root of 20671948 is about 274.4482513102.

The spelling of 20671948 in words is "twenty million, six hundred seventy-one thousand, nine hundred forty-eight".