20963478 has 16 divisors (see below), whose sum is σ = 42036336. Its totient is φ = 6969600.

The previous prime is 20963473. The next prime is 20963507. The reversal of 20963478 is 87436902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963473) 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, 1951 + ... + 6762.

It is an arithmetic number, because the mean of its divisors is an integer number (2627271).

Almost surely, 2^20963478 is an apocalyptic number.

20963478 is an abundant number, since it is smaller than the sum of its proper divisors (21072858).

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

20963478 is a wasteful number, since it uses less digits than its factorization.

20963478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9119.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20963478 is about 4578.5890839865. The cubic root of 20963478 is about 275.7323860538.

The spelling of 20963478 in words is "twenty million, nine hundred sixty-three thousand, four hundred seventy-eight".