20212790 has 32 divisors (see below), whose sum is σ = 39644640. Its totient is φ = 7375104.

The previous prime is 20212771. The next prime is 20212799. The reversal of 20212790 is 9721202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212799) 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, 10697 + ... + 12443.

It is an arithmetic number, because the mean of its divisors is an integer number (1238895).

Almost surely, 2^20212790 is an apocalyptic number.

20212790 is a deficient number, since it is larger than the sum of its proper divisors (19431850).

20212790 is a wasteful number, since it uses less digits than its factorization.

20212790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20212790 is about 4495.8636545162. The cubic root of 20212790 is about 272.4010358026.

Adding to 20212790 its reverse (9721202), we get a palindrome (29933992).

The spelling of 20212790 in words is "twenty million, two hundred twelve thousand, seven hundred ninety".