20740070 has 16 divisors (see below), whose sum is σ = 40204080. Its totient is φ = 7657824.

The previous prime is 20740067. The next prime is 20740073. The reversal of 20740070 is 7004702.

It is an interprime number because it is at equal distance from previous prime (20740067) and next prime (20740073).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740073) 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, 79640 + ... + 79899.

It is an arithmetic number, because the mean of its divisors is an integer number (2512755).

Almost surely, 2^20740070 is an apocalyptic number.

20740070 is a deficient number, since it is larger than the sum of its proper divisors (19464010).

20740070 is a wasteful number, since it uses less digits than its factorization.

20740070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159559.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 20740070 is about 4554.1267000381. The cubic root of 20740070 is about 274.7493915237.

Adding to 20740070 its reverse (7004702), we get a palindrome (27744772).

The spelling of 20740070 in words is "twenty million, seven hundred forty thousand, seventy".