20406070 has 8 divisors (see below), whose sum is σ = 36730944. Its totient is φ = 8162424.

The previous prime is 20406017. The next prime is 20406107. The reversal of 20406070 is 7060402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020294 + ... + 1020313.

It is an arithmetic number, because the mean of its divisors is an integer number (4591368).

Almost surely, 2^20406070 is an apocalyptic number.

20406070 is a deficient number, since it is larger than the sum of its proper divisors (16324874).

20406070 is a wasteful number, since it uses less digits than its factorization.

20406070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040614.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20406070 is about 4517.3078265710. The cubic root of 20406070 is about 273.2665396313.

Adding to 20406070 its reverse (7060402), we get a palindrome (27466472).

The spelling of 20406070 in words is "twenty million, four hundred six thousand, seventy".