20954930 has 8 divisors (see below), whose sum is σ = 37718892. Its totient is φ = 8381968.

The previous prime is 20954911. The next prime is 20954933. The reversal of 20954930 is 3945902.

It can be written as a sum of positive squares in 2 ways, for example, as 19829209 + 1125721 = 4453^2 + 1061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20954933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047737 + ... + 1047756.

Almost surely, 2^20954930 is an apocalyptic number.

20954930 is a deficient number, since it is larger than the sum of its proper divisors (16763962).

20954930 is a wasteful number, since it uses less digits than its factorization.

20954930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095500.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20954930 is about 4577.6555134697. The cubic root of 20954930 is about 275.6949037101.

Subtracting from 20954930 its reverse (3945902), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 20954930 in words is "twenty million, nine hundred fifty-four thousand, nine hundred thirty".