20279470 has 16 divisors (see below), whose sum is σ = 38650608. Its totient is φ = 7634560.

The previous prime is 20279459. The next prime is 20279471. The reversal of 20279470 is 7497202.

It is a happy number.

It is a super-2 number, since 2×20279470² = 822513806961800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20279471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59476 + ... + 59815.

It is an arithmetic number, because the mean of its divisors is an integer number (2415663).

Almost surely, 2^20279470 is an apocalyptic number.

20279470 is a deficient number, since it is larger than the sum of its proper divisors (18371138).

20279470 is a wasteful number, since it uses less digits than its factorization.

20279470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119315.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20279470 is about 4503.2732539787. The cubic root of 20279470 is about 272.7002483997.

The spelling of 20279470 in words is "twenty million, two hundred seventy-nine thousand, four hundred seventy".