20955137 has 4 divisors (see below), whose sum is σ = 23948736. Its totient is φ = 17961540.

The previous prime is 20955133. The next prime is 20955167. The reversal of 20955137 is 73155902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20955137 - 2² = 20955133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20955133) 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, 1496789 + ... + 1496802.

It is an arithmetic number, because the mean of its divisors is an integer number (5987184).

It is a Proth number, since it is equal to 1279 ⋅ 2¹⁴ + 1 and 1279 < 2¹⁴.

Almost surely, 2^20955137 is an apocalyptic number.

It is an amenable number.

20955137 is a deficient number, since it is larger than the sum of its proper divisors (2993599).

20955137 is an equidigital number, since it uses as much as digits as its factorization.

20955137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993598.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 20955137 is about 4577.6781232411. The cubic root of 20955137 is about 275.6958115101.

The spelling of 20955137 in words is "twenty million, nine hundred fifty-five thousand, one hundred thirty-seven".