20970470 has 8 divisors (see below), whose sum is σ = 37746864. Its totient is φ = 8388184.

The previous prime is 20970461. The next prime is 20970473. The reversal of 20970470 is 7407902.

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

It is a super-2 number, since 2×20970470² = 879521224041800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20970473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048514 + ... + 1048533.

It is an arithmetic number, because the mean of its divisors is an integer number (4718358).

Almost surely, 2^20970470 is an apocalyptic number.

20970470 is a deficient number, since it is larger than the sum of its proper divisors (16776394).

20970470 is a wasteful number, since it uses less digits than its factorization.

20970470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097054.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20970470 is about 4579.3525743275. The cubic root of 20970470 is about 275.7630378782.

The spelling of 20970470 in words is "twenty million, nine hundred seventy thousand, four hundred seventy".