402020720947 has 16 divisors (see below), whose sum is σ = 424653465600. Its totient is φ = 379537583040.

The previous prime is 402020720923. The next prime is 402020720971. The reversal of 402020720947 is 749027020204.

It is an interprime number because it is at equal distance from previous prime (402020720923) and next prime (402020720971).

It is a cyclic number.

It is not a de Polignac number, because 402020720947 - 2²³ = 402012332339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402020720147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6586047 + ... + 6646807.

It is an arithmetic number, because the mean of its divisors is an integer number (26540841600).

Almost surely, 2^402020720947 is an apocalyptic number.

402020720947 is a deficient number, since it is larger than the sum of its proper divisors (22632744653).

402020720947 is a wasteful number, since it uses less digits than its factorization.

402020720947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61986.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 402020720947 in words is "four hundred two billion, twenty million, seven hundred twenty thousand, nine hundred forty-seven".