20213151 has 16 divisors (see below), whose sum is σ = 31121664. Its totient is φ = 11430144.

The previous prime is 20213107. The next prime is 20213183. The reversal of 20213151 is 15131202.

It is not a de Polignac number, because 20213151 - 2⁹ = 20212639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20213151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925 + ... + 6998.

It is an arithmetic number, because the mean of its divisors is an integer number (1945104).

Almost surely, 2^20213151 is an apocalyptic number.

20213151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20213151 is a deficient number, since it is larger than the sum of its proper divisors (10908513).

20213151 is an equidigital number, since it uses as much as digits as its factorization.

20213151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 20213151 is about 4495.9038023516. The cubic root of 20213151 is about 272.4026574852.

Adding to 20213151 its reverse (15131202), we get a palindrome (35344353).

The spelling of 20213151 in words is "twenty million, two hundred thirteen thousand, one hundred fifty-one".