20690973232 has 40 divisors (see below), whose sum is σ = 41633404736. Its totient is φ = 9954052416.

The previous prime is 20690973217. The next prime is 20690973269. The reversal of 20690973232 is 23237909602.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178338 + ... + 270529.

Almost surely, 2^20690973232 is an apocalyptic number.

It is an amenable number.

20690973232 is an abundant number, since it is smaller than the sum of its proper divisors (20942431504).

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

20690973232 is a wasteful number, since it uses less digits than its factorization.

20690973232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448985 (or 448979 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 43.

The spelling of 20690973232 in words is "twenty billion, six hundred ninety million, nine hundred seventy-three thousand, two hundred thirty-two".