20151662 has 4 divisors (see below), whose sum is σ = 30227496. Its totient is φ = 10075830.

The previous prime is 20151619. The next prime is 20151667. The reversal of 20151662 is 26615102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5037914 + ... + 5037917.

It is an arithmetic number, because the mean of its divisors is an integer number (7556874).

Almost surely, 2^20151662 is an apocalyptic number.

20151662 is a deficient number, since it is larger than the sum of its proper divisors (10075834).

20151662 is a wasteful number, since it uses less digits than its factorization.

20151662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075833.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20151662 is about 4489.0602580050. The cubic root of 20151662 is about 272.1261579561.

Adding to 20151662 its reverse (26615102), we get a palindrome (46766764).

The spelling of 20151662 in words is "twenty million, one hundred fifty-one thousand, six hundred sixty-two".