20836644070 has 24 divisors (see below), whose sum is σ = 41225560992. Its totient is φ = 7576961040.

The previous prime is 20836644061. The next prime is 20836644077. The reversal of 20836644070 is 7044663802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20836644077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8608974 + ... + 8611393.

It is an arithmetic number, because the mean of its divisors is an integer number (1717731708).

Almost surely, 2^20836644070 is an apocalyptic number.

20836644070 is a deficient number, since it is larger than the sum of its proper divisors (20388916922).

20836644070 is a wasteful number, since it uses less digits than its factorization.

20836644070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17220396 (or 17220385 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 20836644070 in words is "twenty billion, eight hundred thirty-six million, six hundred forty-four thousand, seventy".