20121692 has 6 divisors (see below), whose sum is σ = 35212968. Its totient is φ = 10060844.

The previous prime is 20121691. The next prime is 20121713. The reversal of 20121692 is 29612102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515208 + ... + 2515215.

It is an arithmetic number, because the mean of its divisors is an integer number (5868828).

Almost surely, 2^20121692 is an apocalyptic number.

It is an amenable number.

20121692 is a deficient number, since it is larger than the sum of its proper divisors (15091276).

20121692 is a wasteful number, since it uses less digits than its factorization.

20121692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030427 (or 5030425 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20121692 is about 4485.7209008140. The cubic root of 20121692 is about 271.9911869982.

Adding to 20121692 its reverse (29612102), we get a palindrome (49733794).

The spelling of 20121692 in words is "twenty million, one hundred twenty-one thousand, six hundred ninety-two".