20420967021394 has 16 divisors (see below), whose sum is σ = 30693286800000. Its totient is φ = 10189872023184.

The previous prime is 20420967021341. The next prime is 20420967021401. The reversal of 20420967021394 is 49312076902402.

It is a happy number.

It is a super-2 number, since 2×20420967021394² (a number of 27 digits) contains 22 as substring.

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, 104092204 + ... + 104288200.

It is an arithmetic number, because the mean of its divisors is an integer number (1918330425000).

Almost surely, 2^{20420967021394} is an apocalyptic number.

20420967021394 is a deficient number, since it is larger than the sum of its proper divisors (10272319778606).

20420967021394 is a wasteful number, since it uses less digits than its factorization.

20420967021394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300897.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 20420967021394 in words is "twenty trillion, four hundred twenty billion, nine hundred sixty-seven million, twenty-one thousand, three hundred ninety-four".