20970019 has 8 divisors (see below), whose sum is σ = 24119648. Its totient is φ = 17858880.

The previous prime is 20970011. The next prime is 20970049. The reversal of 20970019 is 91007902.

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

It is a cyclic number.

It is not a de Polignac number, because 20970019 - 2³ = 20970011 is a prime.

It is a super-2 number, since 2×20970019² = 879483393720722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20970011) 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, 8442 + ... + 10639.

It is an arithmetic number, because the mean of its divisors is an integer number (3014956).

Almost surely, 2^20970019 is an apocalyptic number.

20970019 is a deficient number, since it is larger than the sum of its proper divisors (3149629).

20970019 is a wasteful number, since it uses less digits than its factorization.

20970019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19245.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 20970019 is about 4579.3033312940. The cubic root of 20970019 is about 275.7610609710.

The spelling of 20970019 in words is "twenty million, nine hundred seventy thousand, nineteen".