20667070 has 16 divisors (see below), whose sum is σ = 39389328. Its totient is φ = 7780480.

The previous prime is 20667067. The next prime is 20667107. The reversal of 20667070 is 7076602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60616 + ... + 60955.

It is an arithmetic number, because the mean of its divisors is an integer number (2461833).

Almost surely, 2^20667070 is an apocalyptic number.

20667070 is a deficient number, since it is larger than the sum of its proper divisors (18722258).

20667070 is a wasteful number, since it uses less digits than its factorization.

20667070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121595.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 20667070 is about 4546.1049261978. The cubic root of 20667070 is about 274.4266622485.

It can be divided in two parts, 206 and 67070, that added together give a palindrome (67276).

The spelling of 20667070 in words is "twenty million, six hundred sixty-seven thousand, seventy".