20071388 has 12 divisors (see below), whose sum is σ = 35156352. Its totient is φ = 10026720.

The previous prime is 20071367. The next prime is 20071409. The reversal of 20071388 is 88317002.

It is an interprime number because it is at equal distance from previous prime (20071367) and next prime (20071409).

It is a self number, because there is not a number n which added to its sum of digits gives 20071388.

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, 7256 + ... + 9632.

It is an arithmetic number, because the mean of its divisors is an integer number (2929696).

Almost surely, 2^20071388 is an apocalyptic number.

It is an amenable number.

20071388 is a deficient number, since it is larger than the sum of its proper divisors (15084964).

20071388 is a wasteful number, since it uses less digits than its factorization.

20071388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492 (or 4490 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20071388 is about 4480.1102665001. The cubic root of 20071388 is about 271.7643395682.

The spelling of 20071388 in words is "twenty million, seventy-one thousand, three hundred eighty-eight".