20690950 has 48 divisors (see below), whose sum is σ = 45425664. Its totient is φ = 6861600.

The previous prime is 20690939. The next prime is 20690977. The reversal of 20690950 is 5909602.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9897 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (946368).

Almost surely, 2^20690950 is an apocalyptic number.

20690950 is an abundant number, since it is smaller than the sum of its proper divisors (24734714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20690950 is a wasteful number, since it uses less digits than its factorization.

20690950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 20690950 is about 4548.7305921543. The cubic root of 20690950 is about 274.5323180297.

The spelling of 20690950 in words is "twenty million, six hundred ninety thousand, nine hundred fifty".