20900029211 has 4 divisors (see below), whose sum is σ = 22129442712. Its totient is φ = 19670615712.

The previous prime is 20900029147. The next prime is 20900029253. The reversal of 20900029211 is 11292000902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20900029211 - 2⁶ = 20900029147 is a prime.

It is a super-2 number, since 2×20900029211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20900029411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614706725 + ... + 614706758.

It is an arithmetic number, because the mean of its divisors is an integer number (5532360678).

Almost surely, 2^20900029211 is an apocalyptic number.

20900029211 is a deficient number, since it is larger than the sum of its proper divisors (1229413501).

20900029211 is a wasteful number, since it uses less digits than its factorization.

20900029211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229413500.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20900029211 in words is "twenty billion, nine hundred million, twenty-nine thousand, two hundred eleven".